Sonix - what size rear shock? and advice.

[jaxthedog]

I have an '06 Sonix. (16 inch frame)
Manitou Radium R Rear shock.
Main Question --> If i want to replace the radium rear shock - where or how do I find what size it is? So I know what to buy?

Can you guys make suggestions on what shock to buy -
Rear shock with pro pedal and more adjustability than Manitou Radium R.
Budget 100 -150 bucks for a used one on EBay

I've seen fox floats....RP2's from 2008 that are in that range.
Anything else I should look for?

I mainly ride XC trails....mostly with lots of roots or smooth.
I live in TX so no monster downhill sections.

[dogonfr]

measure the eye to eye on the shock mounting bolts then go the RS to get the stroke of the shock.

http://www.sram.com/node/180/brand/rockshox/src/cat

Configurations 152 x 31mm (6.0 x 1.25"), 165 x 38mm (6.5 x 1.5"), 184 x 44mm (7.4 x 1.7"), 190 x 50mm (7.5 x 2.0"), 200 x 50 or 57mm (7.875 x 2.0 or 2.25"), 216 x 63mm (8.5 x 2.5"), 222 x 66mm (8.75 x 2.6")

Manitou ISX-4 or 6 are awesome!!!

http://www.spadout.com/p/manitou-evolver-isx/

[SexualChocolate]

7.5 eye to eye and 2" travel or 190mm eye-to-eye and 50.8mm stroke.

[downhilljill]

I ride a Fox RP23 on my Sonix and love it. The RP2 is also a good choice...just a little less adjustability than the RP23. The RP2 will be a nice upgrade over the Radium.

[dunerinaz]

Look for a manitou s-type in your size. They are a great shock for the money. Bikewagon on ebay sells them for cheap. Most of their auctions have a "make offer" option. I bought mine from them and they accepted my first offer which I thought was a low ball offer. I think they make a few different models. Mine is the SR SPV. I like being able to adjust the platform pressure. Keep it stiff for long rides and lower the pressure for a soft plush ride on downhills.