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For an '07 S-works Stumpjumper frame (193.7mm i2i, 41.3mm stroke)
The AFR rear shock with brain unit is okay after a service, but its not that long before the brain feels like its stopped working again. The bag of internals I've had back with it after each service suggests somethings not quite right
Its feels a bit firm in the initial part of the stroke for any kind of seated comfort, wallows into pumpy type lumps, dives up/down a bit on rocky/lumpy ups and doesn't feel like it wants to ramp up very much at the top end
I've tried it as per the 22-28% sag reccomendation (they supply a sag measuring tool). Any higher pressure and its very firm, any less and it wants to bottom out very easily
Oh and it weighs as much as a piggyback DHX air, around 450g
I think the service charge (needed to keep the warranty) has gone up again. A quick search looks like I could get a new shock for not thaaat much more, though I'd probably need to send it off to tf tuned etc.. plus parts
I'm making an assumption that its possible to travel spacer a rear shock by 22mm (to get 194mm i2i, 41mm stroke - ie 0.3mm of each original dimension)?
Assuming its possible to have rear shock travel reduced, what are my options, whats good whats bad?
Fox - which one - a quick look not finding loads of 216mm 63mm
Rockshox Monarch - which one?
Manitou Swinger/evolver etc ?
What else?
Depending on the shock positioning we were looking for a replacement shock for a 2007 Stumpjumper FSR, unfortunately due to not much space where the shock goes through and connects to the top tube some shocks will not fit due to being too big.
Fox RP23 will fit and they can do a custom length as well.
Another option is a Cane Creek shock, again they can do a custom job and I think it was a bit cheaper then an RP23.
You can see if there are any Fox Triad shocks available as they were standard on the Stumy FSR Comp and had no brain unit but still had Pro Pedal that did work really well.
Your frame might be slightly different as it's an normal FSR not an S-works we were looking for a shock. But the biggest problem was the shock length and diameter.
"Fox Triad shocks available as they were standard on the Stumy FSR Comp"
As you suggested, the i2i/stroke on the alu./carbon SJers are (unusefully) different to one another
Another thing odd with mine is that although I can see the shock bottoms out at about 41.3mm as it should, the 'max' mark marked into the shock 'stantion' is around another 10mm away ..
My wife has a 2007 stumpjumper originally equiped with the triad, this was swapped out for a 200 x 50 RP23 from tftune (with custom valving) Is a straight swap, slight change in geometry but more affected / compensated by the revelation u-turn on the front.
Completly different bike now, much smoother through its travel, and zero bob on the level 2 propedal. Can't recommend enough.
Did similar swap on friends 2008 but required 190 shock length as discovered orignal triad is shorter on the newer (vertical shock) stumpjumper.
See the same shock on ebay for £100 fairly regularly.
Anyone else?
Above all sounds promising