[Closed] xt 11-42 cassette for free...

this needs pics!

Not sure it's free if you're using a new cassette! & you wouldn't condone using a worn cassette would you? Skiptastic!

needs more spoons

Good effort, I'd be packing my chain whip and cassette tool on my next ride tho!

As you're bolting the chain ring to the side of a sprocket does it make the chain ring offset?

I'd thought about this. The biggest issue I could see was getting the chainring bolt holes accurately drilled in the sprocket. If they're out, you'd effectively have variable gearing through the revolutions - like an oval chainring (in that it's not constant).

Also, the spacing would need to be right which by default it wouldn't be because it'd be offset.

Pics though, please!

Seems like oliverracing has gotten a new account name on stw and bodged some cassettes together!

Pics definately needed, sounds good though

edit: Clubber, it would be quite easy with a 3 axis cnc to get the spacing correct in the old sprocket to remove the eccentricity but that also means you have to have access to one.

....or machine down old sprocket, machine out chainring so it fits over sprocket and weld together 😀

Well, yes of course it would be but I expect that's not the norm 🙂

OP we need pictures of this amazing bodge.

it would be quite easy with a 3 axis cnc to get the spacing correct in the old sprocket to remove the eccentricity but that also means you have to have access to one

If you had a CNC mill you may as well make a 42t sprocket from scratch.

Come on OP, lets see some pictures...

I like the idea, would be interested in the execution... a Rummage in the spares box might be in order...

Thinking about it OP, what size sprocket if you canibalise? it' got to be at least a 32t to have enough material to drill/bolt into? (~129mm dia' to accommodate a 104 BCD ring?)

Thinking about it further there must be a way directly attach a 104 BCD adapter/spider to the alloy carrier on an XT (or similar) cassette and then just space it off and remove the 17t...

[img] [/img]

see what I mean?

I'm reckoning on a cassette splined 104 bcd spider. Job done and no machining of teeth required (and 42t chainrings are easy enough to get hold of.

Wouldn't the chainring need to be ramped on the other side?

I'm reckoning on a cassette splined 104 bcd spider. Job done and no machining of teeth required (and 42t chainrings are easy enough to get hold of.

Someone has had a go at this [url= http://www.ruedasalacarta.blogspot.com.es/2013/08/xx1-y-bas-ss1.html ]http://www.ruedasalacarta.blogspot.com.es/2013/08/xx1-y-bas-ss1.html[/url]

Sorry been away all day so slow on the reply.

I'll try and get some more pics up later, but i warn you its not pretty.

The chainring IS offset from the sprocket its bolted to, just the offset is the same amount as the spacer that it would normally need to separate it from the next sprocket down.

As for accurate drilling, I'm sure technically it would make a difference to have it a tiny bit off (i.e. done by eye with a hand held battery drill whist standing on it) but in the real world (i.e. the one i ride in) I have yet to notice it.

[img] http://www.flickr.com/photos/57926477@N06/11454091785/ [/img]

oh photo doesn't work, its here

http://www.flickr.com/photos/57926477@N06/11454091785/

http://www.flickr.com/photos/57926477@N06/11454346156/

before anyone asks why only two chainring bolts, well I only had two to hand so i thought I'd try it like that just to see and it seems ok...

make sure you have a steel freewheel if mounting it to plain sprocket not one on a spider.

Superb bodging 🙂

10 / 10 for effort and inspiration. Good work sir.

make sure you have a steel freewheel if mounting it to plain sprocket not one on a spider.

I had thought of that, and I don't, so i'll ride it a bit and keep checking how the freewheel is wearing. That is probably the main draw back of doing it like this but I guess its a starting point just using what old bits I had lying around not an ideal, long-term solution

tbh the whole idea of this was really a temporary set-up just to see how well the zee mech coped with 42t before investing £60 in OneUp sprocket - and just to see how it felt generally.

Most of the time i get by fine on 11-36 (with 34t at the front) so it shouldn't see too much use but every now and then I could do with it when things get slippy on the climbs and I need to stay sitting down.

Allow me:

[img] [/img]

and also... 😮 😯

oh, i had to grind the teeth off otherwise they hit the chain when its on 36t sprocket...

Allow me:

now why didn't that work for me…thanks

Love it.

Added to the must give this a try pile 🙂

Could you take a pic from the side of the cassette to see the spacing?

Hat.

thought I would try this as well 8) 40t with a zee 😯

[url= http://www.pinkbike.com/photo/10626846/ ]my adaptor pic[/url]

Ooh .... Do you have any adapters spare? Interested if you do 🙂

I only got an Alloy and a Stainless steel one made up to check it out,

fancy a SS one?

Any for sale? Email in profile

An SS one would be great. What would you be after?

Ace.

@ anyone who definately wants one.

let me know it you want alloy or stainless steel.

message me on PB, I'll get some made up and stick it on my buy/sell 🙂

be about £20 each with a couple of spacers I would say, depending on how many I get made up.

DXF here is anyone wants to get it cut themselves 🙂

drive.google.com/file/d/0BzKf__0FNIn7dmlPYkZnZ2NqMkU/edit?usp=sharing

put a vid up with it on a 9 speed 40-11 with a zee mech to check it out

Hats off to you sir 🙂

Yep - nice hacking.

Edit: That's a clutch 10sp Zee - so are you using a SRAM shifter?

Really like your solution, very very neat.

you must have thought about doing a run of these right?? i'd definitely take one even as a test i'd pay for it as well.

iffoverload - pm'ed you on pinkbike i'll take one 😀

@AlexSimon

yes I am using a zee short cage with a SRAM shifter and a 11-40 9 speed.

@gazc YGPM 😉

just put in an order for a few will post here when they turn up 🙂

cheers

Iffoverload I'd be interested in an Alloy spider if you are ordering some more in the future.

I'll PM you on PB if that's OK

I fancy bodging myself a wider range 1x9 setup and that looks just the ticket.

make sure you have a steel freewheel if mounting it to plain sprocket not one on a spider.

It can't be beyond the realms of possibility to mount the chainring to the 36t of a complete cassette with a spacer on the bolts and one behind the cassette to pad out the freehub and spread the load across the whole cassette.

Hi Pete I've pm'd you over on PB.
Thanks Nathan

Ha, nice to see someone do this properly rather than my proper bodge!

I didn't use mine for long as I reckoned it'd trash the freehub, i figured id just order a one-up sprocket instead.

Whilst waiting for the new sprocket I switched to a 30t chainring instead of the 34t I was on before and that seems to be fine now - I never want for a higher gear and the climbs are fine (I live at the foot of snowdon so most rides included a fairly decent climb). I'm not sure I'll bother using the 42t sprocket when it finally arrives.

@ torquil Thanks for sharing 🙂

I dont often spin out but want to keep at least a 32 up front.

got some more made up at last,

they are either steel or aluminium £20 each including the postage and a couple of spacers or 1 of each for £30
any questions please send me a [url= http://www.pinkbike.com/u/iffy/ ]message[/url] on PB

I'll keep my eye on this thread, I'm about to go 1x10 so I'll see how I get on with a 36 before I start messing about.

@iffoverload - does the Alu version have a wider footprint on the freehub body? Got 240 hubs and don't fancy destroying the f/hub....

This would be good on a sportive bike for after cake - anyone tried something like this on a 2x10 105 setup ?

@sillyoldman , no its cut out of 2mm sheet not CNC. I have only used it on a steel freehub body so dont know how a Alu one would hold up.

Someone did suggest fixing the adaptor on the back of a cassette with a carrier.

where theres a will.. 😆

hmmm...interesting.

Any pics of it on the bike?

@ tpbiker

http://www.pinkbike.com/photo/10641823/

more in the album and a vid too.

Interesting idea. I've installed a thick/thin chainring, but kept the small ring in place, so if i need to do a lot of climbing, I can just drop the chain by hand.