Shimano freewheel

[rideswithmoobs]

Shimano Single Speed Freewheel 16t. Says for BMX riding but are they interchangeable and will it fit my Genesis day one ? At nearly 30 English pounds I don't want the wrong one !!!

 

[rideswithmoobs]

Thanks Adrian, do you know if they are good quality ir if better at cheaper price ?

 

[Sharky]

I think some bmx threads are different, so need to check.

I use dicta free wheels, which can be got from velosolo for about £7. If still experimenting with ratios, this is a good option. Same removal tool as shimano. None of mine have failed, but I always have a fixed cog on the flip side, so will never be stranded.

 

[rideswithmoobs]

Just started with SS so waiting maybe till next year before going freewheel. Currently 69 gear inch with a 46/18. Looked online to find thread size of Genesis rear sprocket but can find nothing and they don't send that info with bike

 

[Citius]

Thanks Adrian, do you know if they are good quality ir if better at cheaper price ?

They're all pretty cheap - there's not much that can go wrong with them really, and if it does, well, they're pretty cheap....

 

[rideswithmoobs]

True Citius, just nipped out and had a look. Sprocket on rearhub is shimano splined type with outer lock ring not bmx threaded style

 

[rideswithmoobs]

A quick question. Been reading a lot of descriptions that say 6-9 speed 3/32 chain or updated quality 8 or 9 speed chain. What's this referring to exactly ? (Not the 3/32" bit, I get that )

 

[rideswithmoobs]

Not sure so attached pics

 

[andrew_s]

It certainly looks like a narrow freehub and splined sprocket (with a BB lockring).
This has the advantages that it's much easier to get the sprocket off and it should last better, and the disadvantage that you probably won't find the sprockets in your LBS. They do seem to be available in a good range of sizes (google "splined single speed sprocket").
The spare sprockets that you can get for regular cassettes (eg from Rose) aren't really advisable as the chain will come off much more easily

 

[Smurfy]

That is an unusual setup. See where it states the torque '30 ft lbs'. Is there another bit of text opposite that states the thread type? Shimano gave up threading the freehub body externally like that. It was an old design for cassettes where the last (smallest) sprocket was threaded, rather than using a lockring.

If it is a standard Shimano spline, a regular single speed sprocket for freehub use should fit.

http://www.velosolo.co.uk/andelss.html

http://www.velosolo.co.uk/shopsingle.html

 

[rideswithmoobs]

That is an unusual setup. See where it states the torque '30 ft lbs'. Is there another bit of text opposite that states the thread type? Shimano gave up threading the freehub body externally like that. It was an old design for cassettes where the last (smallest) sprocket was threaded, rather than using a lockring.

If it is a standard Shimano spline, a regular single speed sprocket for freehub use should fit.

http://www.velosolo.co.uk/andelss.html

http://www.velosolo.co.uk/shopsingle.html

Had a look and nothing opposite or on locking ring

 

[rideswithmoobs]

Joy tech hub D236DSE but does not say thread on outer size

 

[rideswithmoobs]

It certainly looks like a narrow freehub and splined sprocket (with a BB lockring).
This has the advantages that it's much easier to get the sprocket off and it should last better, and the disadvantage that you probably won't find the sprockets in your LBS. They do seem to be available in a good range of sizes (google "splined single speed sprocket").
The spare sprockets that you can get for regular cassettes (eg from Rose) aren't really advisable as the chain will come off much more easily

So would I be right in thinking the Genesis has a freewheel hub with the ratchet in the hub & a cog in the outer spline. A freewheel gear like white industries eon, the ratchet is in the cog and not the wheel ? Thus a white industries is not compatible and I need a straight up splined sprocket ?

 

[andrew_s]

So would I be right in thinking the Genesis has a freewheel hub with the ratchet in the hub & a cog in the outer spline. ... I need a straight up splined sprocket ?

That's what it looks like, but I'm going entirely by your photos.
I'd suggest taking the lockring off and seeing whether the sprocket slides off.
You'll probably want to do this anyway to find out how thick the sprocket is where it fits the splines. If you get something the same you won't have to muck about with spacers. Surly are apparently 4.35 mm, Gusset 2mm or 7 mm, On-one 4.0 mm, Shimano 2 mm, Chris King 5 mm, Halo 7 mm