Building a bike, gear query

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ElliottDavo
Posts: 140
Joined: Thu Jul 05, 2012 00:42 am

Building a bike, gear query

Postby ElliottDavo » Tue Dec 25, 2012 17:09 pm

Got a fixie bike from work that has a farked frame (seat post cut off and stuck inside. Tried putting 18stone of force on pulling it out and nothing).

I've got a frame from another bike at home that has vertical dropouts, without a gear hangar as it's got a screw lodged inside one of the holes, and a new hangar is £20.

Wondering if one of these could works:
[list=]Putting the chain at the exact right length
Fitting a gear system from a bike shaped object that doesn't need a hangar and just latches on to the frame (I think)
Fitting a DMR Chain tensioner (prefer not to, quite expensive)
[/list]

Help please

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

Re: Building a bike, gear query

Postby Monty Dog » Tue Dec 25, 2012 18:34 pm

'Magic gear' combos sometimes work - but depends if you've got enough suitable spare sprockets and chainrings kicking about.

You can get rear mechs that simply hook over the rear wheel axle - but think £99 BSO in terms of quality

If you want to die, put a chain tensioner on a fixed gear! OK with a singlespeed freewheel, but the chain tension is too high on a fixed gear
Make mine an Italian, with Campagnolo on the side..

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ElliottDavo
Posts: 140
Joined: Thu Jul 05, 2012 00:42 am

Re: Building a bike, gear query

Postby ElliottDavo » Tue Dec 25, 2012 18:56 pm

Hooking over the rear axle sounds possible, the unnamed shimano rear mechs?

gezebo
Posts: 340
Joined: Tue Dec 30, 2008 21:56 pm

Re: Building a bike, gear query

Postby gezebo » Tue Dec 25, 2012 23:07 pm

Personally I'd persevere with removing the stuck seat post. I know you say its been cut flush but it can be done.

Few ideas here. http://singletrackworld.com/forum/topic ... k-seatpost

Imagination is your friend! Good luck :-)

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g00se
Posts: 2096
Joined: Fri Aug 07, 2009 09:53 am

Re: Building a bike, gear query

Postby g00se » Wed Dec 26, 2012 09:34 am

Asymmetric bottom bracket should work in that situation.


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