[Closed] crank/frame compatability issues.

Come on team! Current ideas...

Shave 3mm off crank arm end...

Create 'custom' dents in chainstay for crank to glide through...

you need to change the crank or frame, that simple.

Great! Anyone know of amy cheap road cranksets with a wider q factor then?

lemme guess...road cranks and mtb or other non road frame?

lemme guess...road cranks and mtb or other non road frame?

Dolan CX frame ^^^^

Are you using the correct bottom bracket? Do both arms hit?

Maybe it needs to be a CX crankset? (never had a road or CX bike so no idea)

Yeh the bb doesn't change on gpx as its the axle length that defines width.

Cx SHOULD be road setup. Both arms hit. Properly hit.

chain reaction are selling raceface cadence cranks for £50.

i was looking at them for my cx frame. sell the outer ring

measure the axle, i have a truvative chain set on my crosslight. i would be happy to check the axle length on mine

thanks mate but i think its the chainstay width that's the issue!

really! i have never heard of that issue before. unless as stated above, you have a narrow road chainset

It will be designed around cx specific cranks.

So nothing is wrong aside for crank choice.

really? so a shimano 105 CX crankset (for example) has a wider bb/axle setup than the road version you reckon?

I don't think it does, its called a CX chainset because of the chain rings.

do you have the correct GPX BB? I know they are different from a normal HT11 BB

no i don't think it does either...

gxp bb is correct. as i said, the bb has no bearing (excuse pun) on crank axle length...

[img] [/img]

as the tyre max width is a 23mm i dont think you chain stays will be that wide!

also a 23mm tyre is tiny! EDIT 23CM is massive

are you using 180 cranks?

ummm, you know that the crank doesn't cross the chainstay at the same point as the tyre clearance happens right?

23mm is indeed tiny, i reckon you'd get about a 50mm tyre in there, so lets ignore that spec sheet!

cranks are 175 or 172.5

but the chain stays will flair out to fit the tyre.

maybe the rear end is stretched out? whats the rear wheel axle width?

does it touch on both sides?

this is gonna end up with me taking a picture.

chainstays DON'T flair out to fit tyre. they are going from hub width at axle to bb width at bb in a pretty straight line.

it does indeed touch at both sides. needs about 2-3mm extra on each side...

rear axle is standard road width, not stretched or owt.

all is as normal, only the chainstays don't have that slight dink in them you used to get, or snake in like you sometimes see, and thus.... cranks hit.

ah ok! now makes sense!

is it a brand new frame? if it is i would be calling dolan and see if they have sold you a duff frame.

i cant remember the last time i a saw a frame with straight chainstays.

in this case it would be the chain stays

sadly tis an ebay purchase... SH.

mtb cranks will fit... but chainline is shite and rings are wrong.

ho hum.

Sounds like an issue with the frame, AFAIK there's no separate standard for cx frames, so they "should" comply with road cranks?

Never liked Dolan anyway, just badged Tawianese tat innit?

indeed. and thus cheap.

tragically i guess they don't have any sram road cranks in taiwan..

You could measure the inner Q factor on your cranks and see if they are narrow cf others.

see this one? (bit of a touring build)

[img] [/img]

has little er... 'dinks' where crank passes.

well mine doesnt.

home made dinks likely to trash a frame? i do love getting the hammer out!

ask dolan. they may be able to sort you out with a frame swap or at least guide you towards he correct arrangement.

a frame swap? for a second hand bike?

That's what I thought...Dolan would likely say the same.

hmmm. i feel a bit like i am where i started with this thread.