Help with an SR hub

[Uncle Monty]

Hi.
Could anybody help me with identifying this SR hub? I know zip about road hubs and even less about fixed wheels. I think it is a probably a fairly low end component. It has a fixed gear fitted and a lock ring. Between the cog and the hub was a spacer - probably to adjust the chain line. Being only just over 1mm thick, aluminium was probably not the best choice of material. I guess nobody had ever tried to climb a hill on it before as on my first attempt the spacer was squeezed out from between the cog and the hub body. Result was a cross threaded cog and lock ring which I have had to remove. The thread on the hub is now really dodgy. I can fit the cog (with its new stainless spacer) but the lock ring refuses to stop cross threading when half way on. Pics below:

Can anybody tell me if this is a specific track hub or an adapted one which would normally take a screw on block? Ideally I would like to find a good as new replacement so any guidance would be appreciated.

Cheers.

 

[Old Ned]

A track hub would have two separate threads, one for the sprocket and a smaller one opposite threaded for the lock ring. A road hub has one thread for the block. You can't alter this so it's either one or the other.

Bad news about the threads on yours, is there a die available in this size to run over them?

 

[Uncle Monty]

Thanks for the information. I am guessing this is a hub produced for a screw on block which has been moved across the axle with spacers added to the non drive side. No idea where the lock ring came from - bottom brackets are not the same thread as a block are they? It does look like a BB lock ring. I doubt I could find a die that size.

 

[Old Ned]

BB lockrings are the same thread as a block and sprocket thread.

 

[Uncle Monty]

That makes sense then. I will get hold of another lock ring and see if that is the problem but I can't see any damage other than the thread on the hub. Any idea what bikes the SR hub would be fitted to? I am guessing fairly bog standard 10 speed mid 90s? It is 36 hole.

 

[monty dog]

Judging by the photos, that's an older 126mm hub that's been fitted with a longer axle in order to convert it to a fixed gear - rather than bodging with a spacer, the wheel hub should have been respaced and the rim redished to get everything to line up together. SR was mid-range, much the same as say Shimano 105.

 

[pigman]

sorry to spit on your bonfire, but I personally wouldnt risk possibly stripping the thread completely when putting down the power. You risk a crash and injury if the sprocket strips the hub.
just my view of course, go with your instinct

 

[Midlife]

That's a very classy looking black frame from what I can see

Buy a new wheel or have it rebuilt with a track hub.. It looks like a road hub with the internals switched with a knackered thread.

Nothing like dropping the family jewels onto the top tube if it all goes pants

Shaun

PS If it's Sakae Royal then it's nice kit.....just before it broke

 

[Uncle Monty]

Thanks for all your input - especially the safety tips . It felt horrible when the original spacer let go - like the tyre was slipping on the rim. I would like to preserve these wheels for the sake of originality, so for use I think a new set are on the cards. 36 hole 700C with a nice plain silver alumimium rim- something bomb proof that can take a wide tyre. Current ones are 700x41C. Does anybody make this tyre size any more? Any reccomendations on rims?
Sorry for all the questions....