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PostPosted: Fri Feb 12, 2021 8:59 pm 
King of the Skip Monkeys
King of the Skip Monkeys

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 33205
Peachy! wrote:
Fit the 8sp, pop it along to your LBS... Bob’s your mothers brother


they'll just laugh at the funny old wheel


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 9:07 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 41
I'd thought of that. But I'm still not sure if an 8 speed will fit.


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 9:09 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 41
It isn't crucial. More of a vanity project. Bike has down tube shifters, but I have some 8 speed Brifters. I thought of putting those on, but don't want buy a new wheel if an 8 speed block won't fit on my existing wheel.


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 9:10 pm 
Retro Guru

Joined: Sun Jul 04, 2010 10:55 pm
Posts: 603
Location: YORKSHIRE
I have a couple of bikes running 8 speed screw on freewheels on hubs that were designed for 7 speed. You can avoid re dishing the wheel by packing out both sides of the hub to the same amount. That will keep the wheel central.You may have to buy a slightly longer axle though. As long as you have some axle in the dropouts and a stout qr you should not have any problems.Sheldon Brown did some trials using a fixed wheel hub with no axle in the dropouts at all. The idea was to try and get some chain ajustment in a frame with vertical dropouts. says it worked well as long as you use an old fashioned strong qr although its one I have not tried.The main thing is the final oln of the hub versus the rear frame spacing. It can and does work though you may have to play about a bit to get it right


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 9:16 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 41
Thank you. The guy who runs LBS says he has an old 8 speed block in his box of obsolete bits. Gratis, or at least a cappuccino, so I'll pick that up and have a play.


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PostPosted: Fri Feb 12, 2021 10:06 pm 
Retro Guru

Joined: Sun Jul 04, 2010 10:55 pm
Posts: 603
Location: YORKSHIRE
Block thickness can be critical when you are doing this so be aware that some freewheels have thick locking rings that can cause problems.Really is just a case of trial and error but as said it can be done


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 Post subject: Re:
PostPosted: Fri Feb 12, 2021 10:13 pm 
Dirt Disciple

Joined: Sun Jan 31, 2021 10:42 am
Posts: 41
Yes indeed. I thought it might be a suck it and see type operation.
I suspect a bit of head scratching awaits.


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