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I’d like to put a Fox DPX2 on my Trek Fuel. The Fuel takes a 210mm x 52.5mm shock. I can get a 210mm x 55mm 2nd hand at a keen price. It came off a Yeti SB140. Trek Fuel is 120mm.
What are the considerations for doing this? Is there a spacer that will reduce the stroke to prevent problems?
My current shock is the DRCV unit that came stock and is pretty shit. It’s 10 years old, leaks and needs a service. Would prefer to spend the $ on an upgrade.
This thread suggests there is a spacer but requires a rebuild. https://www.pinkbike.com/forum/listcomments/?threadid=216680
Probably best to ask someone like TF Tuned.
Putting the longer shock on would give about 6mm more travel. Do you have clearance for that (on all the linkages and tyre)
Nice one. I’m not sure how to tell if I’d have enough clearance for the extra travel. I’ll ask my LBS and see what they reckon. Guy with the shock will hold it for me
Might it be possible to fit it with offset bushings - an offset of 2mm should be close enough maybe?
Offset bushings look good. The shock mounts on the Yeti have a different orientation to mine - the bottom mount on the yeti is rotated 90 degrees from the top.
The shocks are 210mm between the eyelets. The shorter one compresses 52.5mm (157.5 between eyelets fully compressed), the longer one 55mm (155 between eyelets fully compressed). Take your current shock out and check with a ruler that the tyre wont hit the seat tube.
Other possible consideration looking at a trek fuel in side profile is the piggyback - if you have one - hitting the downtube at full compression. although if you arent on the smallest sizes, probably OK.
Deflate current shock, fully compress the suspension, and check for clearance. If more than the 6mm mentioned above (tyre on seat tube, saddle with it dropped, and shock piggy back) then you’re probably good to go.
The 52.5mm shock is probably a 55mm one with a plastic travel reduction spacer fitted at the factory. Check if you've got the clearance for another 2.5mm of movement. My Levo has a 210x52.5 shock and when it was first serviced I had that spacer taken out to get me 2.5mm more shock stroke and thus 7mm more travel - there's enough clearance in the linkages to handle double that!
I don’t know about the dpx2, but the float x has screw in spacers to change stroke length. Just unscrew the aircan (once you’ve let the air out)and unscrew the current spacers and put in the ones you need. I shortened my stroke from 62.5 to 57.5 and it took about 10-15 mins once I’d got the parts I need from Silverfish. Cost less than a tenner I think it was - need longer screws + spacers
Might it be possible to fit it with offset bushings – an offset of 2mm should be close enough maybe?
offset bushings would increase the issue, not decrease it, as fully extended the shock is fine but fully compressed its too short (offset bushings would make it more too short)
OP - the way to test is fairly easy, take your existing shock out (at least of one end) and lift the saddle of the bike down until the 2 sets of eyelets (either end of the shock) are 155mm apart. if nothing is touching anything else in a bad way, you're good to go.
Thanks for the replies.
My Fuel has the trunnion style DRCV shock. I just measure it as 180mm eye to eye. Does that mean a 200mm shock won’t fit? If it fit would it negatively affect the geometry?
I got excited and saw a blog post where someone put a DPX2 on their Fuel but their bike is the newer version with the normal shock that is 200mm eye to eye.
If it’s a trunnion mount 180 i2i shock then that’s the only type and size that will fit.
That's a bummer! Ah well.
Just means you'll need to find a trunnion dpx2 if that's what you want. They do/did make them.
Also I suspect it's a 185mm shock.