Sidmouth Posted May 9, 2014 Posted May 9, 2014 Can anyone help.I am about to take delivery of a new{second Hand bike} from a mate, great deal, the problem is I have a 2 speed crank and the new bike will have a 3 speed crank, can one convert a 3 ring to 2 ring, secondly my current bike has the normal GXP screw in BB , the new bike has a press fit bearing type BB
Jakkals. Posted May 9, 2014 Posted May 9, 2014 Well, a gxp crankset will fit on either GXP bb. You should be able to swop the two cranks around.
Ysterperd Posted May 9, 2014 Posted May 9, 2014 can convert any bike to 1/2/3 ring crank. swapping the cranks out is more problematic depending on the BB the various bikes take. There are adapters on the market for GXP to press fit - I however do not know the longevity thereof
Sidmouth Posted May 9, 2014 Author Posted May 9, 2014 I dont want to swap the cranks as I the 3 speed is in much better condition, I was wondering if you could convert a 3 speed to 2 speed
Ysterperd Posted May 9, 2014 Posted May 9, 2014 Would need a new crank arm, simply dropping a ring would not do anything about chainline
Ysterperd Posted May 9, 2014 Posted May 9, 2014 Sorry, may also be able to do it if you just change spider on the crank - depending on the type of crank
Sidmouth Posted May 9, 2014 Author Posted May 9, 2014 Hi Ysterperd.this is what I was looking for, an answer on that Spider thing, it looks like the crank comes apart even further and I am hoping I can keep the new 3x10 crank but put a 2x10 spider on, sorry speaking with no knowledge but I have seen them selling these spiders in shops?
Kuys Posted May 9, 2014 Posted May 9, 2014 Hi Ysterperd.this is what I was looking for, an answer on that Spider thing, it looks like the crank comes apart even further and I am hoping I can keep the new 3x10 crank but put a 2x10 spider on, sorry speaking with no knowledge but I have seen them selling these spiders in shops? I might have a 3 ring spider for sale. Converted my 3 spd crank to 1 x, so not using the spider anymore. RegardsChristie
Kuys Posted May 9, 2014 Posted May 9, 2014 O sorry, you have both. But you can swop the spiders as far as I know
Sidmouth Posted May 9, 2014 Author Posted May 9, 2014 Great so the spider and not the entire crank dictate the ring number, IE 2 or 3What does a spider cost? Christie, what do you want for your?
Chip Posted May 9, 2014 Posted May 9, 2014 (edited) Great so the spider and not the entire crank dictate the ring number, IE 2 or 3What does a spider cost? Christie, what do you want for your? How much do you want for your 2x10 spider? I would be interested, I have a 3x10 crank on the way and my bike is 2x10, maybe we could even swop spiders. Edited May 9, 2014 by Chip
Sidmouth Posted May 9, 2014 Author Posted May 9, 2014 How much do you want for your 2x10 spider? I would be interested, I have a 3x10 crank on the way and my bike is 2x10, maybe we could even swop spiders. LOLyes I do, But I will have to convert both cranks to 2x10, to match the current gearing on the old bike, so I will just need a second spider
Chip Posted May 9, 2014 Posted May 9, 2014 LOLyes I do, But I will have to convert both cranks to 2x10, to match the current gearing on the old bike, so I will just need a second spider Sorry my bad, didn't read the whole thread...doh!!! Were in the same predicament.
NotSoBigBen Posted May 9, 2014 Posted May 9, 2014 Just to be sure it is marked BB30 so I guess it is specific to that?
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