Xtr m970 crank bolt alternative?

[ishaw]

While I don't need one right now, the stock mounting bolt isn't made of the strongest stuff and the hex fitting seems to round off easily so planning ahead.

The bolt is different to other Shimano ones of course, so wondering if there are any alternatives should the inevitable happen at some point?

 

[velofrog]

I had a Yummy Yumeya gold one once upon a long time ago and it made my Tranny twice as fast…. honest

 

[ishaw]

I've got one of those on one set of cranks. They do make you go faster, but are there any other options other than the Shimano supplied ones?

 

[madjh]

KCNC use to do some bolts, you have to check if it is compatible with yours https://www.bikeinn.com/ciclismo/kc...8k43pfKPIZ8A83g4yChoCSZkQAvD_BwE&gclsrc=aw.ds

 

[ishaw]

Thanks, I am not sure if the normal Shimano ones fit as they tend to be for cranks with the pinch bolts. The m970 ones are wider/fatter at the top. Not sure how much practical difference this makes but the bolt is also used as part of the arm extraction using a special tool.

 

[Grannygrinder]

Following intently
Just picked a set up for buttons, but no bolt

 

[ishaw]

Not been too many options suggested. The only possible option I've found is this, but have no idea if it will work or not, as never had the newer xtr cranks to compare bolt fit....

Durable Crank Bolt Crankset Screws Bicycle Components For XTR FC-M9100 | eBay

Bike Bicycle Crank Screw Crank bolt For-Shimano XTR FC-M9100. Although the aluminum alloy material is lengthened, the weight is no different from the original one. Made of high quality material, durable and practical to use.

www.ebay.co.uk

 

[66 triumph daytona]

I think I used an NC-17 bolt on mine a few years back.

 

[ishaw]

What sort of nc-17 bolt?

 

[Grannygrinder]

I decided to take a punt on the type b Dura ace one of that era. Dims say its the right length and diametre.
Assume it's the correct/same thread.
Will report back on the off chance that it fits