Bicycle Mechanics - Rear hub upgrade

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nebill
10-06-02, 01:00 PM
Here is the deal...I am wanting to upgrade an old Paramount that I have. The distance between the rear dropouts is 127mm. Currently, the bike has a 6 speed freewheel, a Suntour long cage rear der, and I am using friction shifting bar-end shifters. Would sure be nice to move up to 7 or maybe 8 speed cassette, but I would just as soon not spread the rear spacing. Any thoughts or suggestions?? Thanks in advance for the help.

mechBgon
10-06-02, 01:11 PM
Current road hub spacing is 130mm, which is as near as no difference. Go for it :)
pokey
10-06-02, 01:47 PM
Actually his is more likely 126, and there is a difference. 7speed spacing was126 and many late ones were 130. 8,9,10 speed is i30.Sheldon Brown at www.harriscyclery describes a way to get 8 speeds on a 7 speed shimano cassette hub.

mechBgon
10-06-02, 05:07 PM
Maybe I was biased by the recollection that Paramount built their frames at 127.5mm for a while when Dura Ace 8sp had just surfaced. Was that 1992...? :confused: Anyway, the official line was that it was intended to work either way (recall that Dura Ace rear hubs had those rounded-edged locknuts to spread the frame on 126mm frames).

A 126mm steel frame can be cold-set to 130mm, as another option. Hope it all works out for you! :)
D*Alex
10-07-02, 06:17 AM
A 7-speed FREEWHEEL should work, provided that there are no mounting screws that will interfere with the chain at the dropouts, but an 8-speed FREEWHEEL will likely require redishing of the wheel, as well as spreading of the dropouts.
The 8-speed bit that another member referred to is only for a CASSETTE, where it is possible to put 8 cogs and spacers of 9-speed dimensions on a 126mm hub.
pokey
10-07-02, 06:41 AM
A 7 speed freeewheel would be the no bainer,but he said he wanted a cassette. 8 speed freeewheels just make no sense due to poor axel support and potentail breakage.
nebill
10-07-02, 03:47 PM
Thanks for all the replies! Gotta keep these old bikes a rollin'!! I can see that the easiest would be the 7 speed freewheel, but I'm also going to try the rear wheel off my other Paramount (Shimano 8 speed cassette) and see if that fits. The 9 speed cogs on the 126 mm hub sounds intriguing, also!! Thanks again! Bill