Comas Pro ISIS

Product code: 14028

Please note these cranks may feature some small cosmetic marks to the surface.

Tough but light ISIS cranks.
Thread is compatible with almost all screw-on trials freewheels!

- Lightweight, tough cranks from Comas' Pro series of parts.
- Constructed first by being forged, then completed by CNC-machining - a process that gives an optimal blend of strength, stiffness and durability.
- Found on select Comas complete bikes.
- ISIS fitting is compatible with a wide range of BBs.
- 1.37" x 24tpi thread suitable for use with any threaded sprocket or freewheel we sell (unless otherwise mentioned).
- Wide threaded section allows the use of a bashring.
- Large recessed sections forged into the rear face of the crank reduce weight substantially without compromising strength.
- Tough anodised black finish is complimented by stylish laser etched graphics.
- Available in 160mm length only.
- Weight: 410g
- Offset: 31mm

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 crank bolt torque is at least 310 in-lbs (35 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.

Please note that the minimum required thread contact between crank arm and sprocket/freewheel is 7mm, and a 1.37" sprocket/freewheel with maximum internal thread diameter 33.80mm (NOT 1.375") must be used. Failure to adhere to this instruction will damage the cranks threads and this is not covered under warranty.

Please note: due to the manufacturing processes used for these cranks, there may be small variations in concentricity between the freewheel and bottom bracket interfaces. This can lead to a certain amount of run out for any freewheel, sprocket or adaptor installed on the crank arm. While this isn't an issue on trials bikes, for applications requiring much higher tolerances we cannot guarantee they will be suitable. Please get in touch if you have any questions.

A little heavy

Posted by muku

Weight: 387g The real weight is about 412g I think there are some individual differences.

Reply from TartyBikes

Hi Osamu

We've double-checked the weights of the cranks we currently have in stock and you are correct, they have increased in weight slightly. We get 410g average. Sometimes there are inconsistencies with manufacture that add or remove a few grams from a product, but generally this difference is no more than about 5% as described in our Terms and Conditions regarding Accuracy of Information. We've updated the product to reflect the current weight. Thanks for letting us know!