Wheels - what fits what?
- Thread starter Rusty Scrubber
- Start date
poweredbypies
Old School Grand Master
- Feedback
- View
Most likely you will need new hubs. You also need to check the width of the rear dropouts they have grown over the years. Someone with mor experience of this will be along shortly.
Rusty Scrubber
Retro Guru
as a rule casettes that are designed to take x amount of gears wouldnt be big enough to add more (where would they go)but using spacers say on a 9 speed casette you could put an 8 or even a 7 on there but you would have to make sure they have the same spline pattern. also older casettes use the last cog as the locking cog so the thread is on the outside of the casette, newer ones have a lock ring which screws into an internal thread, they are not interchangable although im pretty sure ive seen a casette body with both threads but i might be wrong. regarding screw on freewheels they do just that, screw on to the hub where a casette uses an internal bolt to hold the casette body onto the hub (the hub wouldnt have a thread. fixies (where the pedals go round and cant frewheel) usually use a hub with a left hand thread to counter the stopping force trying to undo the cog with a locking ring holding it in place or they also use whats called a flipflop hub which can take a cog on each side of the hub to enable you to run diferent ratios say, or to have a fixed cog on one side and a freewheel on the other, then you just take the wheel out and flip it round to suit what you want it for. if a hub is threaded for a freewheel and the freewheel has multi cogs on it then the hub is 'dished' i.e. the centre of the hub isnt inline with the centre of the rim like the fron wheel is, this allows for the space needed to fit the freewheel so in theory you could remove the freewheel and replace it with a singlespeed freewheel but the chainline would probably be out so you would have to re dish the wheel to get the hub shifted more centrally to the rim if that makes sense. hope that helps its kind of brief and ive missed some stuff out, i wont even mention helicomatic.....doh!
Rusty Scrubber
Retro Guru
yes screw on freewheels (the cogs) wether they are single or multiple amounts will screw onto a threaded hub so if you had a wheel with a 5 cog screw on freewheels you could take it off and screw on a 7 speed screw on thats not a problem. the problem comes in fitting the wheel to the bike, is there physically enough room for the extra cogs in the frame, does the axle protrude far enough to clear the last cog or will the frame hit the last cog when its done up, is the dishing right for the extra width of the new cog all of that needs to be considered but yes you can remove a freewheel on a screw on hub and replace it with another.
the difference between a freewheel and a casette is the ratcheting part (the bit that allows you to stop pedaling and coast) is part of the cog unit on a freewheel and on a casette the cogs can be removed from the casette body which houses the ratcheting part. the advantages for a casette are you can replace the cogs without having to replace the body so in theory its cheaper (although screw on freewheels tend to be cheap anyway) and you have more variety in gear ratios.
the difference between a freewheel and a casette is the ratcheting part (the bit that allows you to stop pedaling and coast) is part of the cog unit on a freewheel and on a casette the cogs can be removed from the casette body which houses the ratcheting part. the advantages for a casette are you can replace the cogs without having to replace the body so in theory its cheaper (although screw on freewheels tend to be cheap anyway) and you have more variety in gear ratios.
Rusty Scrubber
Retro Guru
Hi ; would agree with all that Chute55uk has said ; but would also add that from memory ; the threads on screw-on hubs differ in size between multiple and single fitments. I reckon a good bet could be to either/both list your parts and maybe post a pic of the hub you intend using? Enough expertise on here to help you out I'm sure. As far as using brakes on disc rims ; really wouldn't know but if they have a proper sidewall then ... maybe ... again a pic would help.
well i bought a 1974 raleigh road bike at the weekend and it has a modern hybrid wheel with a 7 speed screw on and it fits fine in the frame but i would imagine creative use of spacers should solve any discrepancy. ive decided im going fixed so im going to source a flipflop for the same bike to save any spacing re-dishing aggro.Neil":2rizmjhq said:
