Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_500C_68_72mm_01_jd

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 500C 68-72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 500C 68-72mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 500C 68-72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 500C 68-72mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 68/72 m m Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Brake sensor cutoff: 2 pcs. Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 46T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 500C 68-72mm” is in sale since Sunday, September 5, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Part Type: Conversion Kit
  • Item Length: 72 mm
  • Brand: BAFANG

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 500C 68-72mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_46T_120mm_01_mr

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 120mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 120mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 120mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 120mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 120mm Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Hydraulic Brake cutoffs: 2pcs (work for all brakes). Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 42T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? Full throttle on 0 + other levels are unlocked. Speed limit set by displays command throttle overrides this limit however, limit only controls pedal assist (PAS). Power when using PAS kicks in sooner when you start pedalling, increased responsiveness and improves pedal assist hugely. All levels 1-7 are more usable, custom mapped current % and speed %, pedal assist will significantly improve because of this. 30amp Unlock, most BBSHD from past 2 years are restricted to 28amps, unlock can be done on request only (make sure your batteries are rated for 30amps continuous). 7% increase in max output power. With an integrated speed sensor, this mid-drive motor, which is compatible with a 120mm bottom bracket, has a rated power of 1000W with peak of 1700w, these can be programmed to output up to 3000w when paired with an external controller! A reduction ratio of 1: 21.9 and a maximum torque of 160 N. The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 120mm” is in sale since Sunday, September 5, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Width: 120 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 120mm
Bafang_750w_Mid_Drive_Electric_Bike_Conversion_Kit_Incl_Battery_01_gl

Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery

Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery
Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery
Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery
Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery
Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery

Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery
Brand New Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl 48v17.5Ah Samsung Cell Battery! A chance to ride your very own E-Bike for half the price of a commercial ready built E-Bike! This is a full kit to convert your standard push bike into a powerful E-bike! It includes the motor, the battery, display, thumb throttle, all bolts and wires needed to install! It’s really simple to install with just a few tools. Pictures of my previous builds are available on request, my favourite build is in the photos. We also have the 250w in stock with a 36v 14ah downtube battery for those of you who would like to be road legal. Discount given for private sales contact George on: 07494275320. Will deliver locally for free (Burton-on-Trent, and surrounding areas). Why choose a Bafang 750W Motor in a few words…. Looks slick and tidy on the frame, and looks expensive too! Best option for riding off road. Great at hill climbing. Puts out 750w of power which equates to SPEED! Responsive pedal assist with 9 speed settings! Why choose a mid drive over a hub (wheel) driven system? It is light weight, what weight it does carry is very low to the ground and in the center of the bike providing perfect balance and stability. Best option for hill climbing due to the ability to use the gears of the bike, so you can climb hills quickly in a low gear and go fast downhill in a high gear! Not having a heavy wheel leaves the bike more maneuverable and agile when offroad. Model: Bafang BBS01 750w Mid Drive. Life on full charge with motor set to pedal assist: est 40mile+. Charge Port: DC2.1. Cycle life: 800 charges. Charger included: Yes, UK plug. Please note that when hill climbing please use a low gear on your bike (it is easy to forget and this can put excess strain on the motor). The item “Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery” is in sale since Friday, August 27, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “geolemar0″ and is located in Burton-on-Trent. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Battery Capacity: 17.5ah
  • Voltage: 48 V
  • Compatible Bike Type: Universal
  • Set Includes: Bottom Bracket
  • Battery Type: Lithium Ion (Li-Ion)
  • Part Type: Conversion Kit

Bafang 750w Mid-Drive Electric Bike Conversion Kit Incl Battery
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_46T_500C_68_72mm_01_pf

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 68/72 m m Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Brake sensor cutoff: 2 pcs. Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 46T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm” is in sale since Monday, August 23, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Length: 72 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_42T_120mm_01_ayz

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 120mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 120mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 120mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 120mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 120mm Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Hydraulic Brake cutoffs: 2pcs (work for all brakes). Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 42T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? Full throttle on 0 + other levels are unlocked. Speed limit set by displays command throttle overrides this limit however, limit only controls pedal assist (PAS). Power when using PAS kicks in sooner when you start pedalling, increased responsiveness and improves pedal assist hugely. All levels 1-7 are more usable, custom mapped current % and speed %, pedal assist will significantly improve because of this. 30amp Unlock, most BBSHD from past 2 years are restricted to 28amps, unlock can be done on request only (make sure your batteries are rated for 30amps continuous). 7% increase in max output power. With an integrated speed sensor, this mid-drive motor, which is compatible with a 120mm bottom bracket, has a rated power of 1000W with peak of 1700w, these can be programmed to output up to 3000w when paired with an external controller! A reduction ratio of 1: 21.9 and a maximum torque of 160 N. The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 120mm” is in sale since Monday, August 23, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Width: 120 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 120mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_46T_500C_100mm_01_tpj

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 100mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 100mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 100mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 100mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 1 0 0 m m Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Brake sensor cutoff: 2 pcs. Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 46T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? Full throttle on 0 + other levels are unlocked. Speed limit set by displays command throttle overrides this limit however, limit only controls pedal assist (PAS). Power when using PAS kicks in sooner when you start pedalling, increased responsiveness and improves pedal assist hugely. All levels 1-7 are more usable, custom mapped current % and speed %, pedal assist will significantly improve because of this. 30amp Unlock, most BBSHD from past 2 years are restricted to 28amps, unlock can be done on request only (make sure your batteries are rated for 30amps continuous). 7% increase in max output power. With an integrated speed sensor, this mid-drive motor, which is compatible with a 1 0 0 mm bottom bracket, has a rated power of 1000W with peak of 1700w, these can be programmed to output up to 3000w when paired with an external controller! A reduction ratio of 1: 21.9 and a maximum torque of 160 N. The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 100mm” is in sale since Monday, July 26, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Width: 100 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 100mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_46T_500C_68_72mm_01_psgc

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 68/72 m m Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Brake sensor cutoff: 2 pcs. Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 46T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm” is in sale since Monday, July 26, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Length: 72 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 46T 500C 68-72mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_42T_120mm_01_neiy

Bafang BBSHD 1000W-1700W Mid-Drive Motor E Bike Conversion Kits 42T 120mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E Bike Conversion Kits 42T 120mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E Bike Conversion Kits 42T 120mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E Bike Conversion Kits 42T 120mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 120mm Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Hydraulic Brake cutoffs: 2pcs (work for all brakes). Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 42T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? Full throttle on 0 + other levels are unlocked. Speed limit set by displays command throttle overrides this limit however, limit only controls pedal assist (PAS). Power when using PAS kicks in sooner when you start pedalling, increased responsiveness and improves pedal assist hugely. All levels 1-7 are more usable, custom mapped current % and speed %, pedal assist will significantly improve because of this. 30amp Unlock, most BBSHD from past 2 years are restricted to 28amps, unlock can be done on request only (make sure your batteries are rated for 30amps continuous). 7% increase in max output power. With an integrated speed sensor, this mid-drive motor, which is compatible with a 120mm bottom bracket, has a rated power of 1000W with peak of 1700w, these can be programmed to output up to 3000w when paired with an external controller! A reduction ratio of 1: 21.9 and a maximum torque of 160 N. The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E Bike Conversion Kits 42T 120mm” is in sale since Monday, July 26, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Width: 120 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E Bike Conversion Kits 42T 120mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_42T_68_72mm_01_xef

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 6 8 / 7 2 m m Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Hydraulic Brake cutoffs: 2pcs (work for all brakes). Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 42T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? Full throttle on 0 + other levels are unlocked. Speed limit set by displays command throttle overrides this limit however, limit only controls pedal assist (PAS). Power when using PAS kicks in sooner when you start pedalling, increased responsiveness and improves pedal assist hugely. All levels 1-7 are more usable, custom mapped current % and speed %, pedal assist will significantly improve because of this. 30amp Unlock, most BBSHD from past 2 years are restricted to 28amps, unlock can be done on request only (make sure your batteries are rated for 30amps continuous). 7% increase in max output power. With an integrated speed sensor, this mid-drive motor, which is compatible with a 6 8 mm bottom bracket, has a rated power of 1000W with peak of 1700w, these can be programmed to output up to 3000w when paired with an external controller! A reduction ratio of 1: 21.9 and a maximum torque of 160 N. The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm” is in sale since Monday, July 26, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Length: 72 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm
Bafang_BBSHD_1000W_1700W_Mid_Drive_Motor_E_Bike_Conversion_Kits_42T_68_72mm_01_vkp

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm
Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm
Discount for collection order, Old Trafford , Manchester. 48V/52V 1000W-1700W peak BBSHD Mid-Drive Motor with 6 8 / 7 2 m m Bottom Bracket Length: 1 pc. 500C display + Operation Button: 1 pcs. Hydraulic Brake cutoffs: 2pcs (work for all brakes). Thumb Throttle: 1 pc. Waterproof Quick Release harness: 1 pc. Speed Detecting Sensor + Magnet: 1 pc. Chain wheel: 1 pc 42T. Left Crank + Right Crank: each 1 pc. Fixing Plate: 1 pc. M510 Nuts: 5 pcs. M612 Nuts: 2 pcs. M33 Nuts: 2 pcs. Free install Tool 1 pcs. Need help selecting a battery? Or with the installation? Full throttle on 0 + other levels are unlocked. Speed limit set by displays command throttle overrides this limit however, limit only controls pedal assist (PAS). Power when using PAS kicks in sooner when you start pedalling, increased responsiveness and improves pedal assist hugely. All levels 1-7 are more usable, custom mapped current % and speed %, pedal assist will significantly improve because of this. 30amp Unlock, most BBSHD from past 2 years are restricted to 28amps, unlock can be done on request only (make sure your batteries are rated for 30amps continuous). 7% increase in max output power. With an integrated speed sensor, this mid-drive motor, which is compatible with a 6 8 mm bottom bracket, has a rated power of 1000W with peak of 1700w, these can be programmed to output up to 3000w when paired with an external controller! A reduction ratio of 1: 21.9 and a maximum torque of 160 N. The item “Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm” is in sale since Monday, July 26, 2021. This item is in the category “Sporting Goods\Cycling\Bike Components & Parts\Electric Bike Components”. The seller is “ebikesystemscouk” and is located in Manchester. This item can be shipped to United Kingdom.
  • Brand: BAFANG
  • Item Length: 72 mm
  • Part Type: Conversion Kit

Bafang BBSHD 1000W-1700W Mid-Drive Motor E-Bike Conversion Kits 42T 68 72mm