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Bonz 3D Forged Crankset

Product code: 13225

£165.83

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Bonz 3D Forged Crankset

165mm
175mm

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- Splined, two piece crankset from French brand Bonz.
- Features a through-axle system which sees the right hand crank arm and BB axle constructed as one piece, increasing stiffness over regular 3 piece assemblies.
- Unique axle system also allows for an oversized steel bottom bracket axle, improving strength and durability.
- HG splined system means it is much easier to fit and remove freewheels (please note, freewheel is not included with this product - either the Bonz Splined or Crewkerz Splined will fit).
- The assembly is pre-loaded by the large red 10mm allen key bolt, and then held in place with a pinch bolt in the non-drive side crank.
- Please note that the pre-load bolt requires little torque. This is used only to pre-load the bearings, and so should only be "nipped" in place. Damage caused by over-tightening this is not covered by warranty. The black, M6 pinch bolt should be tightened to 10Nm maximum to keep the crank in place, and this should be checked regularly.
- A bashring is not supplied with this crankset. Any standard bashring with 35mm hole can be mounted, but the combined width of the freewheel and bashring needs to be 21mm give or take a small amount. We can modify a bashring to fit if you need, please contact us for details.
- Chunky, fully sealed cartridge bottom bracket bearings sit in external style bottom bracket cups with standard 1.37" x 24tpi threads to fit most modern trials frames. Cups require a Hollowtech2 style tool for fitting and removal.
- Forged then CNC machined cranks feature large cutouts at the rear, saving lots of weight while still ensuring good strength and stiffness.
- 163mm spacing from rear of left crank to rear of right crank gives equivalent clearance to some 33mm offset cranks on a 128mm ISIS BB.

Weights:
- Right hand crank and axle: 359g (160mm), 372g (170mm)
- Left hand crank: 221g (160mm), 235g (170mm)
- BB cups, bearings, bolts and spacers: 121g
- Total: 701g (160mm), 728g (170mm)

Additional Information

Ensure that your pedals are tightened to at least 310 in-lbs (35 Nm) every 5 minutes for the first few rides. Before fitting, it's also a good idea to make sure your pedal axles are clean (a wire brush works well) then greased before installation.
Similarly, always check the black, M6 pinch bolt torque is at least 88 in-lbs (10 Nm) every 5 minutes for the first few rides, then each and every ride after that.
Failure to keep your pedals or crank bolts tight as described above is likely damage your cranks and this will not be covered under warranty.
The red, aluminium pre-load bolt featured on these cranks should not be used to tighten them on. This is used only to pull the cranks together and pre-load the bearings. It requires only "nipping" into place, and damage caused by over-tightening is not coverable by warranty.

Questions

Scott

Hi guys are these cranks compatible with other external bottom brackets like Shimano, Hope ec

Posted by Scott on 04/10/2016

Reply from TartyBikes on 05/10/2016

Hi Scott - We believe they should be, as long as your existing BB uses a 24mm axle/bearing system. We can't say for sure though as we don't have experience with that setup. Thanks, Mark

Thomas Minney

Will this crank set fit an onza pro and how do I check what size 165mm or 175mm???

Posted by Thomas Minney on 29/07/2017

Reply from TartyBikes on 31/07/2017

Hi Thomas - We haven't got any experience with fitting these to an Onza Pro, but I believe they should work. You could use either 165mm or 175mm, although 165mm would be closest to what's fitted to your Pro as standard. Thanks, Mark

Dean

would this fit my ozonys v5 frame please?

Posted by Dean on 11/08/2017

Reply from TartyBikes on 11/08/2017

Hi Dean - This crankset should fit your Curve frame fine. Thanks, Mark

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  • © TartyBikes Ltd, 2018
  • Tel. (UK). 01772 32 33 33
  • Tel. (Intl). 0044 1772 32 33 33

TartyBikes Ltd, Units 3-4, Club Street, Bamber Bridge, Preston, PR5 6FN

  • Company No. 6131482
  • VAT. GB 860 0270 59

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