Crank length help

chriskurton
Posts: 22
Joined: 30 Apr 2017, 5:10pm

Crank length help

Postby chriskurton » 5 Aug 2018, 10:17am

Owing to ongoing knee problems I am after some advice regarding crank length
I am not tall 5'2" and have low gears . I also have a small bike, however the cranks are 170mm.

Currently I ride with XT Deore front - 40 -30 -22 and rear 42-11, 11 speeds.

I believe that I should be riding a 160mm crank length.

Has any one any advice as to how I could replicate this with a 160mm crank and if so where can I get this. Ideally I would not want to change the mechs both XT currently (expensive), although I am happy to go down from 11 speeds, but keeping the same bottom, stump-puller gear.

Any suggestions would be gratefully received.

pwa
Posts: 10263
Joined: 2 Oct 2011, 8:55pm

Re: Crank length help

Postby pwa » 5 Aug 2018, 10:29am

Talk to Spa Cycles.https://www.spacycles.co.uk/m2b0s109p20 ... chainrings

Oh, just realised you want 11 speed. Anyone know if this will work with 11 speed?

crazydave789
Posts: 584
Joined: 22 Jul 2017, 10:21pm

Re: Crank length help

Postby crazydave789 » 8 Aug 2018, 9:45pm

this fits the size, cheap enough to try it.

https://www.ebay.co.uk/itm/SR-Suntour-C ... crank.TRS0

LollyKat
Posts: 2886
Joined: 28 May 2011, 11:25pm
Location: Scotland

Re: Crank length help

Postby LollyKat » 9 Aug 2018, 10:55am

The OP should also buy a suitable bottom bracket at the same time; even if the current cranks are square taper like the recommended shorter ones, the alignment may well be out because they are different brands. The Suntour cranks + bottom bracket are only £35 which seems well worth a punt. They will also need a BB tool and an 8mm Allen key - friends or community bike workshops can help.