single speed on hybrid frame

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Joined: Wed Jan 09, 2013 15:34 pm

single speed on hybrid frame

Postby JAGsham » Wed Jan 09, 2013 16:02 pm

Hi there, I have a hybrid bike, Pinnacle Borealis, bought several years ago. The gears have gradually died and other aspects of the bike are dying. Rther than replace the entire thing i thought i might convert it to a single speed and try to salvage as many parts as possible and replace worn ones. One problem i face is finding a single speed wheel to fit the chainline of the hybrid bike. with the current chainset nd bottom bracket the chainline is 54mm which i think is pretty standard for hybrid/mountiain bikes. my back wheel needs replacing otherwise i could have used the old cassette with spaces inserted to line up the single gear. Having looked online, most of the wheels for single speed have a chainline of 42mm. Is that totally standard and am i unlikely to get a single speed wheel with a 54mm chainline? If so, am i better off getting a wheel with a cassette and spacers?

Arthur Scrimshaw
Posts: 2170
Joined: Sun Sep 27, 2009 11:14 am

Re: single speed on hybrid frame

Postby Arthur Scrimshaw » Wed Jan 09, 2013 16:32 pm

single speed kit? ... cts_id=265

might need a chain tensioner ... cts_id=268

also do the kits in colours

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Monty Dog
Posts: 20382
Joined: Thu Dec 14, 2006 14:31 pm

Re: single speed on hybrid frame

Postby Monty Dog » Wed Jan 09, 2013 19:01 pm

Perfectly feasible: Assume that your rear hub is 135mm OLN i.e. standard MTB width? Is your chainset a triple? In which case convention would be to use the middle chainring position which is 47-50mm chainline. The 42mm chainline is typically for track / fixed gear bikes which use a narrower 120mm hub. There are plenty of singlespeed MTB hubs available, just not complete wheels so you'd need to get someone to build one for you - cheapest hub about £60, rim £25 (Superstar), spokes £16-18. sprocket £10 plus £20-30 build cost. You'll also need to worry about maintaining chain tension (chain tensioner) unless hoping to find a 'magic gear' combo.
Make mine an Italian, with Campagnolo on the side..

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