Rear shock stroke length/travel adjustment?

[Amber Valley Guy]

My bike takes a 210 x 50mm rear shock, but I've seen some bargains at the more common 210 x 55mm. What I've managed to learn is most rear shocks manufacturers use spacers to reduce the stroke, so a 55mm is the same as a 52.5mm and a 50mm or a 65mm is the same 62.5mm or a 60mm, the only difference being a travel/stroke spacer for less than a tenner (usually of 2.5 or 5mm).
Does anyone know if it's true....the reason being the two I've been looking at are £150 less in the 55mm size than 50mm stroke (but both still 210mm eye to eye).

 

[John_likes_bikes]

Correct, a single eye to eye shock can be set up with multiple stroke lengths. This is achieved by limiting the stroke inside the shock, different manufacturers do that in slightly different ways with the same result. Not all shocks can do this and some are easier to change than others.

The real question is can your frame handle more wheel rear travel? Depending on compression curve 5mm in stroke can add 10mm or more in travel, leading to the tire contacting frame, over rotating pivot points, etc. And any damage this causes isn't going to be covered under warranty bc you when outside of spec.

 

[Amber Valley Guy]

Other way, I'm wanting to reduce the travel in a 55mm shock to 50mm, as I said above.

 

[JP-NZ]

Other way, I'm wanting to reduce the travel in a 55mm shock to 50mm, as I said above.

What is the bike and which shock are you looking to buy?

 

[Amber Valley Guy]

It's a Cannondale Moterra 4, Marzocchi Bomber Air or DVO Topaz 3.

 

[JP-NZ]

The bomber air, you can add reducing spacers I believe they are 0.1" and you'll need two that equals 5mm. So you can buy a 55mm and convert it to 50mm.

I don't think DVO allow you to change stroke length internally.

 

[Amber Valley Guy]

Sorted, Marzocchi Bomber Air and Fox Float X share the same stroke travel spacers. They are not the same as the 0.1" volume reducers found in the volume reducer kits. The correct ones are 2.5mm in thickness (like the 0.1" volume reducers) but are split and held in place by 2 M3 screws on the piston head (which also will need changing for longer M3 X 12 csk set screws as called for by Fox/Marzocchi in the tech diagram (last pic, call out at top of of diagram).

Available on eBay by the seller Trail Forge (a very helpful guy) and listed as... Fox Float X Travel Spacers 2.5mm - Set - MY2022-2025 - 803-01-798 - 233-00-444

Someone else might find this useful.

 

[402.ac]

Do you know if this is possible with Rock Shox shocks? I'm interested in the super deluxe, both air and coil.

 

[steve_sordy]

...................................

I don't think DVO allow you to change stroke length internally.

Yes, they do! See the attached thread from this Forum.

DVO Topaz travel spacer

I'm trying to chase down a 2.5mm and preferably a 7.5mm travel spacer for a DVO Topaz T3. There are some in Europe but 20-30 euro's postage is a little hard to take for a $3 part. DVO USA have none and my local agent here in New Zealand has none. So if anyone has one they are willing to sell and...

www.emtbforums.com

 

[steve_sordy]

Also this thread, see post #24

Anyone fitted a DVO Topaz shock to a Jam2?

I have a size large Focus Jam2 9.6 NINE with a Rockshox Deluxe Debonair 210x55 shock. I am looking at replacing it with the DVO Topaz T3 shock. The problem is the piggyback oil reservoir in that it may hit the TEC pac battery. There are no dimensions of the Topaz to be had anywhere that I can...

www.emtbforums.com

 

[Plummet]

You can always just run the 55 stroke shock after checking that the extra 5mm of shock stroke doesnt hit anything cause any clash when you test it at full bottom out

Yourl end up with more travel.

 

[Zero cool]

I know a few people who have done this with their YT Decoy 29. You can over stroke it from 230x60 to 230x65 and get an extra 10mm rear travel with no problems. (Matt Wragg did it on his Decoy to take it from 145 to 155mm).

 

[Blownoutrides]

So… by this logic I could theoretically change the 205x65 Telum on my Norco Range vlt into a 205x60 to fit my Dreadnought v2 by 3d printing a clever 5mm spacer and installing on the shaft above the bottom out bumper?

Might clack around a bit but would theoretically go.