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Gonna try new chainring before I rule out possibility of that entirely. Have taken everything off the freehub and checked as best I can for an elliptical rotation and couldn't see anything more than a possible 0.1-0.2mm deviation, but could be wrong on that, as you say, checked almost everything else out!
I is based in Ashford (surrey), right out south west of Heathrow.
Ordering a Renthal 42t ring from chainreactions now. -
Sounds as though the chain could have a stiff link as previously mentioned,check it again and again it may not be visible straight away.The size of your chainrings is fine,that shouldn't make a difference.
I would have to agree with dan.If it was me i would personally ditch the 9 speed chain and opt for something alittle wider like a standard width BMX chain and try that before anything else.
Have checked the chain by hand for stiff links, not just eye and it seems fine.
Apart from obvious strength increase from a BMX style chain, are there any other real benefits?
I wanted to up the size of the chainring mainly to give me some better options ratio wise, as I'm gonna be spinning like a bitch when on the road! Plus, if there isn't quite enough chain tension, I reckon the Shimano chainring designed with shallow teeth, ramps and pins for smooth shifting might be a possible cause of probs... but woulda thought that would only affect things if the chain line was off and would make the chain come off the ring altogether, not just skip a tooth.
Thanks for the input guys, I'm pretty stumped on this myself and appreciate other minds on the problem! -
'dan - The sprocket is a wide based SS adapter sprocket that can only go on one way round on the HG freehub body and is already the second one of its type I've tried, the first being a 16t that was a little loose and I wasn't certain wasn't slightly elliptical, but it doesn't appear to have been that, or at least not totally.
Will be getting a 42-44t chainring soon as I have some cash spare anyway as a 36t is just too small.
Think, as you say, its just gonna be a case of experimenting with different combinations to get the right chain tension and grip.
So frustrating when I've got £1200 worth of bike, that I spent about 3 months scraping and saving to pay for parts and STILL can't ride the bloody thing!
Oh well, guess it all helps to stock up parts for any future projects! :P -
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Is it slipping over the chainring or the sprocket? Sorry if I missed something in the OP.
A SS ring will have taller teeth. Also I found finding a chain tensioner that actually worked something of a minefield when my 29er was SS.
Tbh, while riding it (the only way of getting enough pressure to make it slip), its kinda hard to tell whats slipping. But after replacing the sprocket, I'm kinda sure it ain't that.
After staring at this bloody thing upside down turning the pedals for a couple of hours I'm starting to agree with you on both accounts dude. Hpefully a larger SS chainring will help. Any recommendations for chain tensioners? -
Had looked at the chain, but gave it a better check of each links vertical and horizontal movement and its fine, full oiled and free moving with no kinks.
The hub freewheel is a standard geared version, with spacers and sprocket. Sprocket is pretty tight in there and looks as straight as it can be.
Had the spring wound damn tight on the tensioner pulling up before and it was still slipping.
Chainring is brand new, and has less than 1mm horizontal movement, which I'm pretty sure the chain would take up the slack of. Want to replace with a 40-42t SS ring anyway, so will see if that helps.
Apart from that, am pretty much at a lose as to what it could be! -
Buy Pistoffski's Klein
I know a cellar which might have a Klein in it, but you'll have to cross many palm with silver to gain entry...
I might well be interested depending on important factors such as frame size, whether you can wait couple of weeks for my next pay check and the all important amount of said silver! :D
PM me, I am looking for new frame, preferably road or track, to start next project as just finishing current one (I REALLY don't like being bored!).
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Ok, you guys are probably gonna hate this set up, but its my first SS on a vertical dropout mountain bike frame.
Problem I'm having is that under any real pressure the chain skips a tooth (at least I assume its the chain and not my new hub), but my chainline is mm spot on.
Have tried reversing spring tension on chain tensioner, so its pulling the chain up (instead of down away from chainstay) so it wraps more round the sprocket, which helped a little but still skipped and so I changed the sprocket to a better quality one, to no avail.
The sprocket, chain, hub, chainring, cranks and BB are all new and installed properly (I think) and its all 9 speed compatible.Spec; Shimano SLX M665 double and bash chainset with the inner removed and original 36t ring (so far), SRAM PC991 chain, standard single jockey chain tensioner, Gusset 15t sprocket.
When I contacted the manufacturer of the first sprocket, they suggested that it might be the chainring. As its not designed for SS use, could this be the issue? Or maybe its the SRAM powerlink? I cannot work this out and its really starting to piss me off having spent 3 months saving and building this bike to not be able to ride it! GRRRR!!!
Any suggestions?!
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unipack is a shitty cheap make; see create bikes
Right, gotcha. So in other words, unipack = the cheap piles of mass produced floury coloured cack that I see a lot of trendy wannabes, who can't be bothered to actually build their own, riding?! (not saying that cheap or fluorescent is necessarily bad) :D
brilliant summary!
Why thank you dear sir! :P
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Hope you've got a decent lock on that shed!
Is shed envy a sign of middle age? Cos I have it.
I think its one of those things, the minute you got something you need to store and work on that mum (or the misses depending on what age this hits you!) shouts at you if she finds in the house... instant beginnings of shed (or garage) envy!
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Narrower != lower rolling resistance. If you want something a bit more sporty than Big Apples (you don't, but there's no accounting for taste), Marathon Racer Evo is available in 40-559
http://www.schwalbetires.com/bike_tires/road_tires/marathon_racer_429
I'm sure you could run them tubeless with sealant
http://www.schwalbetires.com/mtb_tl-readyOk, thought I'd check what the weight difference it would be to change to No Tubes kit and the much faster rolling (or so I've been informed) Shwalbe Marathon Racer 26" x 1.5" tyres and I can save HALF A KILO PER WHEEL going with them! 0_o
Have just ordered them from chainreactions.
No wonder the new build felt so bloody slugish... -
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If some one where to sponsor me to go learn to build frames, I'd build em any damn frame they wanted, THEN get serious and build my own which I doubt very much would look like that! :D
(and if anyone wants to pay for me to learn carbonfibre frame building PM me!)