Upgrading Shimano 8spd to SRAM Rival

[djh]

I have a bike, currently kitted out with an assortment of older Shimano components. I am planning to upgrade from the 8spd setup to a modern 10spd configuration, but have some questions regarding compatibility.

 

The current bike has a Shimano 105 (RD-1050) rear derailer, 105 8spd cassette (11/23), newish (2007 vintage) Tiagra front derailer, RX 8spd shifters/brake levers, new Tiagra brake calipers, square taper BB and RSX 175mm cranks (52/42). A Shimano HG50 8spd chain completes the setup.

 

Am I right in thinking that my 8spd cassette is interchangeable with a new 10spd cassette (Shimano or SRAM), so that if I change the cassette, shifters, chain and rear derailer, I will have a working 10spd system? I plan to upgrade to a compact crank and BB in the next stage of the conversion, to keep costs down.

 

If this is feasible, would the following components be suitable?:

 

SRAM PG1070 cassette (12-27 or 11-25)

SRAM Rival carbon shifters

SRAM Rival rear derailer

SRAM PC1030 chain

 

Comments and suggestions are welcome.

[TNT1]

a 10 speed cassette will probably not fit your existing freehub, and you probably wont get a replacement freehub that will take a 10 speed cassette = you will need a new rear hub (and at minimum a rearwheel rebuild.)

 

ten speed chains are narrower, and will not run or your rsx crank/chainrings. You wont get 10speed chainrings for an rsx crank = you will need a new crankset.

[javadude]

Yes, your 8 speed hub can take a 10 speed Shimano/Sram cassette. I'm sure the 8 speed cranks will also be OK, but not optimal. According to Sheldon Browns website its not an issue. Go check out this page for some useful info:

 

http://www.sheldonbrown.com/speeds.html

[javadude]

Its only Campag 8 speed that cant take a 9 or 10 speed cassette.

[Tiny K]

Thanks for the info - I am looking at upgrading to the Force

[djh]

So it sounds as if my plan will work, even with the older crank until I upgrade that.

 

Thanks for the comments.