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PostPosted: Fri Feb 12, 2021 12:07 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 47
I have a seven speed wheel. Not a cassette but a freewheel.
Can I simply put an 8 speed freewheel on the wheel and use 8 speed index (Shimano) shifters, or do I have to make some modifications?


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 12:21 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 10258
Location: Scotland
Is it a freewheel? Or a cassette/freehub?

I don't think you can with a freewheel??

If it's the latter then you can put a 8 speed cassette body on there,may need to swap axle spacers around, or red-dish the wheel slightly, I've done it a couple of times and not needed to adjust the wheel though, used an 8 speed STX cassette body and axle the last time.


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 12:27 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 47
It is not a cassette. It is a scew on freewheel.


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PostPosted: Fri Feb 12, 2021 12:45 pm 
Retro Guru
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Joined: Thu May 17, 2012 11:04 am
Posts: 1110
Location: manchester
It depends on the OLN and frame stay geometry. If your 7 speed looks like it has plenty of spare space between the last sprocket and frame, then it might fit an 8.


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 1:06 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 47
Thanks. There seems to be plenty of space. Space enough for the chain to fall into!


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PostPosted: Fri Feb 12, 2021 8:01 pm 
King of the Skip Monkeys
King of the Skip Monkeys

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 33207
can always play around with the axle spacing to get it to fit, then redish the wheel over

just remember it puts a lot of pressure on the axle and they can snap as the bearing is almost in the middle whereas cassette hubs the bearing is outboard


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 8:13 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 47
Thanks. Not sure I'm up to relishing the wheel. Each beyond my pay grade!!!


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PostPosted: Fri Feb 12, 2021 8:15 pm 
King of the Skip Monkeys
King of the Skip Monkeys

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 33207
its just loosening one lot of spokes and tightening some others so the rim sits central


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 8:28 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 47
I have tried it. Several times. Wheel never stays true or round. Guess I just don't have it when it comes to wheels.


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PostPosted: Fri Feb 12, 2021 8:57 pm 
BoTM | rBoTM | rider
BoTM | rBoTM | rider
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Joined: Wed Jan 17, 2018 8:42 pm
Posts: 5134
Location: VCC Member 5558 East Riding of Yorkshire
Fit the 8sp, pop it along to your LBS... Bob’s your mothers brother


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