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- 17 comments
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okay, great, thanks so much. With the madness ruled out, I'm just going to do it all up, with the numbers on my side, give it a ride and then come back and moan. Cheers everyone.
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Thanks for that. If that's the case then I must just be wrong. I'd take a photo of it but my girlfriend's taken my camera to Uruguay. I keep looking at it and the chainring just seems further out than the sprocket even when it's right next to the drop out. If I've measured this correctly, how can that be.
I may be interested in one of those spacer kits, thanks. as they say, 8 spacers is better than 4.
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With the cranks I've got, I'm going to have to take a file to the cranks to get the chainring on the inside. Plus, the chainring makes a nice 'all in one pattern' with the cranks when it goes on the outside - haha. I haven't ridden it yet. I wanted to get the chainline right, at least by eye, before taking it out. Also, didn't want to start hacking things up and then find out it could have been a whole lot easier and i'm just not getting something - I'm not that gifted a mechanic.
I've got a 16 sprocket on the back. Just what came with the DMR spacer kit but it looks about as tough soup. That may need changing. The chainring's a 44 so I reckon that's an alright ratio.
I may be being naiive/simple but surely measurements are measurements. If one person can do it, surely we all can. It certainly feels naiive to say it.
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wow, that was fast.
Yeah, It's an xt hub made for a 9 speed cassette. The sprocket, at the moment, is as close to the frame as it'll go. If I moved it in, the chainline would be even worse. What are the measurements I should be dealing with exactly? At least if deal with measurements, I can rule out the madness. Thanks
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Hello all,
Tired of having my nice bikes pinched, i'm building up a cheapish SS but have run into (probably schoolboy) problems.
I'd really appreciate any advice you could offer.
I've all but built up a single speed conversion. Had an old Marin frame and my brother let me have his wheels, so I've done the whole conversion thing with spacers etc... All went smoothly until I got to the drive train. I left the big ring on some octalink LX cranks using slim bolts and put the sprocket on the back right next to the frame. The shortest bb I can find is 113mm but the chainline was visibly out. I stuck in a 107mm tapered bb with some old cranks and left the big ring on (as above). I measured the distance between the ring and the centre of the seat tube - about 51mm (Sheldon reckons on 52). But it's still not right. I now think that
- I'm going mad
- The big ring must go in the middle position - a pain in the arse
- The chainline will be alright as it is (?)
- I don't get it
If you could offer me some help I'd be truly grateful.
- I'm going mad
Just to update you, if you're interested...
I used a 107mm bb with some deore cranks (the others were fooked and its teeth looked like steptoe's) and left the 44t ring on (the outside) - The chainline was 56mm.
I sorted the sprocket at the back to match. Using my eye was rubbish, it depended on which eye I used, time of day, type of light, desire for it to be straight/resignation that it wasn't/paranoia.
put the singulator on(pushing up - just managed it) and just took it for a spin. It was beautifully smooth which was nice. Heard one almighty crrrrack as I went over a sleeping policeman but I reckon that was just the saddle 'bedding in'.
thanks again all