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Dropout spacing / frame stress?(8 posts)

Dropout spacing / frame stress?goathead1
Aug 17, 2001 6:28 AM
I have a frame made of Reynolds 520 CrMo I'm building as a commuter bike. The rear dropout spacing is 135mm. I'm trying to avoid buying or building a new set of wheels, so I was thinking about using my spare set of road wheels. Will it stress the frame too much to just use the skewer to compress the frame? I know you can have dropouts respaced to widen, but can you narrow them?
here's what to do:Rusty McNasty
Aug 17, 2001 7:56 AM
Go to the local harware store, with your verniers in hand, and buy enough washers to space each side 2.5mm. You may even find a nut which will do the job. Seat stays can handle some bending, but are more prone to bending out than in. In this case, the solution is SO EASY, I wouldn't even consider "bunging it in".
Hackgrzy mnky
Aug 17, 2001 8:32 AM
That will work but it'll like like something out of the Beverly Hillbillies. There is absolutely no reason why you can't bend the stays in and got the dropout faces parallel. You can do it at home, througha LBS that has the alignment tools or swing by a frame builder. Steel doesn't really care which way you bend it and if the deflection is small and distributed work hardening shouldn't be a factor.
here's what to do:goathead1
Aug 17, 2001 9:07 AM
Doesn't the spacer approach lead to axle length problems? The wheels have Campy daytona hubs, and though I may be wrong, i don't remember any threaded axle showing.
Yepgrzy mnky
Aug 17, 2001 1:36 PM
That would be the part that Nasty hasn't thought about b/c he's never actually done it or thought it all the way through.
I don't think so.Kerry Irons
Aug 17, 2001 5:45 PM
You're hardly going to have any axle protruding into the dropout with this bogus concept. You either need a longer axle plus washers between the lock nuts and the hub, compress the frame (may result in bent axles if the frame goes out of alignment when you do this) or cold set the frame. However, just riding it may serve to cold set the frame. I know this works when spreading a steel rear triangle so it may work (in reverse) when compressing.
How about...Atombomber
Aug 17, 2001 7:50 PM
As said by the wiser few, just clamp it in as is, or.....

Get a new MTB axle for 135 spacing, and two sets of 2.5 (or combination to make up) millimeter washers from a bike shop. It'll take about 15 minutes to change it all over, and you get fresh grease in the bearings as a bonus.

Just my 2 cents, and waiting for some smart-assed response from the guy in Putzburg.
just bend the frameJofa
Aug 18, 2001 1:52 PM
Really, nothing bad is going to happen. Otherwise, compress it with the skewer every time you put the wheel in. It isn't critical at all, and I wouldn't dream of messing about with hub internals for a commuter made in heavy steel.

Jofa