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single speed(4 posts)

single speedjradford
Oct 19, 2002 9:42 AM
is there a single speed freewheel that will just screw on the a normal 126mm rear hub?
Oct 19, 2002 10:02 AM
From Sheldon Brown:
A single-speed (BMX) freewheel is a modular unit, consisting of a single sprocket and its associated freewheel (coasting) mechanism. These have standard 1.37" x 24 tpi threads, and fit on any hub that takes a thread-on freewheel. This includes BMX hubs, track hubs, and multi-speed freewheel hubs.

For a complete lesson, go here:
For a fixed/freewheel discussion from last month on this board:
That's how I built my SS for $14.95cory
Oct 19, 2002 9:44 PM
Assuming the hub's a freewheel type (I think all 126s were, but maybe not), then a BMX freewheel will spin right on. You'll probably also need a spacer or two, but they're dirt cheap--$1 each from any BMX-oriented bike shop. I bought three or four in various thicknesses so I'd have the right one when I got home, but with my old middle chainring, a single 4.5mm spacer gave me a near-perfect chainline.
Too many choices, actually ...Humma Hah
Oct 21, 2002 6:15 AM
... Turns out there are a lot of variants of SS freewheels. When I ordered my second one, the LBS never bothered to tell me that they'd selected a brand at random, not the same type as the first I'd bought from them. Removing freewheels usually is best done with a freewheel puller, an inexpensive tool made for a particular pattern of notches on the freewheel. Out of 2 freewheels, I managed to get 2 patterns, neither of which did the LBS have a puller for.

Pick a type, get the tool, and beat the LBS manager about the head and shoulders with a stout stick if he tries to foist off a different type on you.