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New cassette and chain time not ready to jump to 11speed yet circa £170ish Need cassette and 42t extender.
One up are an eye watering $80=£55ish
Uberbike are slightly less tear inducing at £30.
Any reason not to get one?
Yup, they work.
You don't get a 16t with it - so I just didn't bother with one. Had OneUp and 16t before which also worked fine. Both with an XT mech with Radr cage.
Superstar make a cheap one too. Mine has been fine. Also worth looking at cassettes from sunrace and praxis. All in one, ready made. Iirc the sunrace is a decent price compared to buying the bits if you need a new cassette anyway
Praxis/Sunrace 10s wide range cassettes probably worth considering if you need both cassette and expander.
SS out of stock of 42t and works don't list a 42t.
I'll try the uber as I have a credit for merlin, XT cassette reasonably priced.
Uber's'll most likely be a carbon copy of someone else's so it'll work fine.
If you want to change to a 16T then shimano's is the best option anyway, that was always a pain in the bum but Bird sell them now. I've done it both ways but it's worth changing imo.
SBS10 was a discount code sent to me late last week for 10% off at uberbike
Sunrace MS3 is £42.50 at Triton - working well for me...
[url= http://www.tritoncycles.co.uk/components-c9/cassettes-freewheels-c68/sunrace-ms3-10-speed-cassette-p14798 ]MS3 cassette[/url]
Here is my maths on working on which route I want to go down for a 10s 40t setup.
Ready made cassette from Sunrace:
MX3 (40t) - £53
Expander ring and new cassette:
SLX - 40t (Uber) - 16t OneUp - £62
Xt - 40t (Uber) - 16t OneUp - £74.50
Xt - 40t (works) - 16t OneUp - £66.50
(Note: the SLX you would need to manually take apart by cutting a pin holding the cassette together)
Will also be cheaper if you can find a Shimano 16t sprocket off ebay or some oneline shop for £4-8. The OneUp 16t is £11.
addy6402, what mech are you using with that Sunrace cassette? I've got the Shimano SLX but heard you may get shifting issues with the 42T and a Shimano mech?