- Retro Road Bike – Wheel Dilema
Just aquired a 70’s Falcon Majroca 531 road bike. I need to understand if the 120mm rear hub frame width could fit a cassette hub of any sort as the rear wheel is 5 speed screw through.
Are thetre any wheels that I could buy to fit the frame? Ideally want to fit STI leaver as well so would need 8 speed cassette minumum.
CheersPosted 4 years agomattsccmMember
Whilst I agree with the Oldgit’s theories , in practice you can just give them a yank. Hold the drop outs in front of you and give them an equally pull outwards. They will have to go more than the 10mm combined that you need. The dropout’s will not be parallel with the centre line of the frame but you won’t notice that but its a good thing if they are parallel with each other 😆Posted 4 years ago
If the mech hanger is built in and is not inline with the centre line a tug with some water pump pliers will do it. Actually I suspect it might have a separate hanger in which case bend it a gnats.
Or you could pay someone to do all this properly.
If it was mine and I really wanted STI I would sell it and buy something newer, maybe with a 126 spacing.
Don’t get ya cynic-al if indeed he does have a hanger and cold sets the stays the the hanger will be out, he might get away with it but the hanger will be out.
Stays are welded to the BB shell, the drop outs are parallel. Spread the stays and the drop outs will move out of alignment, they’ll flare out. Never found it an issue on frames I’ve done with vertical drop outs, but ones with the early long horizontal drop outs have been ‘awkward’ But again keep it five or six speed friction and no problem.
Those Falcon drop outs don’t have IIRC a screw adjuster to set the wheels position, that combined with drop outs that are now not parallel and modern STI’s and you’d be lucky to get good shifting.
I’ve never used any proper tools, just threaded rod with nuts and penny washers using a spanner to open up them as evenly as possibly. And just reset drop outs in the workshop using eye and line 😕
I had a 531 frame with a 126 spacing and it would take a 130 though a wheel change could be a bit of a faff.
I’m sure when I had my last frame with 126mm ends built, the builder said the shape of the ‘short’ ends would allow the use of the new fangled 130mm hubs, something to do with a flared mouth?Posted 4 years ago
Might have dreamt that.cynic-alSubscriber
oldgit – Member
Don’t get ya cynic-al if indeed he does have a hanger and cold sets the stays the the hanger will be out, he might get away with it but the hanger will be out
Anyone who knows what they are doing will set the dropouts, with which the hanger should be in line.
Never seen the process that holds the stays in place while you bend the drop outs back again to a parallel position
They temain in position while one sets the dropouts.
Sorry but this is basic stuff and no matter how long you’ve been doing whatever if you don’t get thus then you don’t understand the basics.
martinxyz – Member
Even on a budget and some spare time.. why not trim the axle, re-space it and sort out dish? Don’t go wangling old steel frames to suit hubs. Wangle hubs to suit old frames.
The dishing on modern hubs compared to 5s makes this dodgy/impossible.Posted 4 years ago
Never seen it done properly….is there a proper way? are there tools that do this, always thought it was a workshop bodge.
That said Argos did my old Gios, like to think they didn’t do it with a plank of wood and pump pliers!
How do you do it?
I can remember doing a 70’s Claud and the chainstays looked almost curved by the time they were at 130mm, so I set them back.
I do understand the basics of bending some tubes and setting the drops so everything works fine. not sure what you don’t think I understand.Posted 4 years ago
Set the stays
Set the drop outs
check all measurements
Seems to work every time.
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