Taking cogs of Suntour Winner Freewheel

plug1n Posts: 204
edited August 2007 in Road general
I've got 3 Suntour Winner freewheels from when I was younger :(

All the cogs are in good shape, but the 13-21 makes horrible knocking sounds on cogs 4 & 5 only.

So I'm trying to swap the cogs on one of the others which are 13-18 straight (which is a joke at my current size).

I thought you just used a couple of chain whips to hold the largest cog while unscrewing the smallest 2 cogs - All I do is bend or break the chain whip.

Anyone have any tips?




  • sorry, can't ofer any help but I've just put a bike back on the road after 20 years in the shed. First thing I did was remove the 13-18 and put back the 13-21 in conjunction with a "proper compact" TA 48/38 double.

    Could I really pedal that? My Scott sub20 with 48/38/28 and a 32 low rear suits my 61 year old legs much better. I've set myself a target of a suitable modern road bike with fairly close clearances but just enough to squeeze in some guards.
  • plug1n
    plug1n Posts: 204
    John, well I'm a mere 53 but I also changed to a 13-24 and put a 38 on the front.

    I'm in West Herts myself and the Chilterns can be a problem but I really need to loose some weight as I am carry at least 1 spare bike around.
  • WGC for me and I'm still getting to grips (again) with Hertford / Ware / Hadhams area.

    hadn't thought of my 'slight' excess weight but quick recalc ad it's certainly more than the Scott weighs.
  • Phil Russell
    Phil Russell Posts: 1,736
    You are going about it the right way.

    My method is: Get a good bit of 4x2. Secure freewheel to it by driving nails between the largest cog teeth into the wood.

    Secure wood in a bench vice. You can now use a chain whip, or as a last resort a very blunt cold chisel, to drive the smallest cog around to undo the cogs. I say 'smallest cog' because I do not think the smallest 2 are fixed together ... I think the second smallest is fixed on the splines. CARE: it is possible to damage the teeth on the cog with the cold chisel, but I have rarely done this.

    Incidentally... I am sure I have a spare, new, 30 or 34 cog from a 5 block somewhere looking for a home.

    Cheers, Phil
  • Phil's right, you're doing it the accepted way.

    Another mildly unacceptable way so to firmly clamp the freewheel into a vise (with wood blocks) across the largest sprocket, firmly fix one of those locking clamps
    http://www.irwin.com/irwin/consumer/jht ... Prod100319
    across the smalled sprocket, and beat on it with a hammer.

    Sometimes, though, a tooth pops off and that's not good.
  • plug1n
    plug1n Posts: 204
    Thanks for the suggestions, I'll have another go this weekend