Spanner size needed, please help.

[groover247]

Guys,

I have a fair few new school hubs, cassette of course.

They are all the type with screw on sprockets.

I need to change the sprockets, but have no idea what size the flats are on the body, i sure as hell aint clamping the cassette body in a vice.

Any help would be appreciated, i just wanna find out the size so i can grind a spanner flatter and get it in there.

Cheers
sutty

[SaMAlex]

I dont know too much about cassette hubs as Ive only had/seen a few of them (and there are loads out there now). The ones I have seen just have a push on "driver" that is held in place with the cone nuts. You just undo the cones and it all pulls apart.

[HEYWOOD BMX]

  An Odyssey 10mm Race takes a 34mm.You don`t by chance have a spare retaining nut? Mine blew up and I can`t seem to get a replacement anywhere!


                          James

[street]

Do you have some vernier calipers?
If not, you can get a cheap plastic vernier caliper for something like £1.50 at Wilkos, it's plenty thin so it should fit in there for you to measure the nut 

[Sirkillalot]

Guys,

I have a fair few new school hubs, cassette of course.

They are all the type with screw on sprockets.

I need to change the sprockets, but have no idea what size the flats are on the body, i sure as hell aint clamping the cassette body in a vice.

Any help would be appreciated, i just wanna find out the size so i can grind a spanner flatter and get it in there.

Cheers
sutty

back of the cassette body in a vice is the quickest and easiest mate, just make sure theres some aluminium jaws in there, take the pawls out and clamp it across them, and use a chain whip on the sprocket. works a treat everytime,just beware your gonna need brute force to un do them! I broke a chain whip undoing one on a proper hub it was that tight!yorkshire brute force is whats needed!!