21’ Stumpjumper EVO thoughts

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21’ Stumpjumper EVO thoughts
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Posted: Nov 3, 2021 at 6:29 Quote
I wish they had designed the box more like how BOLD has theirs with that shock in the frame. The structrual support side is on the topside with the opening in the bottom.

Posted: Nov 3, 2021 at 6:50 Quote
Didzy2009 wrote:
Interesting if frame only builds then they are the silver/brown one that comes on the elite model really keen to see them built up and want to know how thick the downtube is on the alloy one too if you ever get chance to have a check in the swat box

Vitals first impression reported dents in the down tube from rock strikes. My guess is not very thick, but can’t confirm

Posted: Nov 3, 2021 at 11:14 Quote
Upside is you can push dents out from the swat box lol

To be fair the guy testing the bike for Vital was massive and riding really loose rocky terrain. Still not exactly confidence inspiring

Posted: Nov 3, 2021 at 11:39 Quote
Anyone been brave and put in the next size bigger token in the dpx2? It comes with the 0.6, which is supposed to be the biggest for a 210x55 according to fox, but I would assume that's based on 350psi... Wondering if anyone is running the 0.86

Posted: Nov 3, 2021 at 11:50 Quote
I tried the .86 spacer but it was only a marginal improvement for me. After a few rides I tossed the DPX2 in the bin and got an Ohlins coil and Cascade link. Drastically better performance.

Posted: Nov 3, 2021 at 11:56 Quote
WalrusRider wrote:
I tried the .86 spacer but it was only a marginal improvement for me. After a few rides I tossed the DPX2 in the bin and got an Ohlins coil and Cascade link. Drastically better performance.

I like the shock as it is quite well. Even a marginal improvement, just on bottom-out would probably make me happy. I just don't want to blow the thing up.

Posted: Nov 3, 2021 at 11:59 Quote
WalrusRider wrote:
I tried the .86 spacer but it was only a marginal improvement for me. After a few rides I tossed the DPX2 in the bin and got an Ohlins coil and Cascade link. Drastically better performance.
Did you ride at all with the DPX2 after you put the CC link and BEFORE you got the Ohlins?

~JSV

Posted: Nov 3, 2021 at 13:26 Quote
Just a hypothetical, but how much of a safety/rideability/stiffness/durability issue is a crack in the downtube? I mean, the SWAT door is the size of beer can, is another hole on the bottom a life and death sort of thing? I realize that one was meant to be there, and one is from a random failure, but what if I rode my bike with a crack or two in it? I have dental insurance and I've got a few steel bikes that make some suspicious noises from the bottom bracket area and I have yet to turn any of them into dual unicycles.

Posted: Nov 3, 2021 at 13:48 Quote
ksilvey10 wrote:
WalrusRider wrote:
I tried the .86 spacer but it was only a marginal improvement for me. After a few rides I tossed the DPX2 in the bin and got an Ohlins coil and Cascade link. Drastically better performance.

I like the shock as it is quite well. Even a marginal improvement, just on bottom-out would probably make me happy. I just don't want to blow the thing up.

There is a reason Fox specifically says the .6 volume spacer is the largest you should put in a 210x55 shock. It's your body, your choice to take the risk. It would really suck if the shock exploded though.

Posted: Nov 3, 2021 at 17:17 Quote
For those of you who keep asking about possible solutions...

https://raawmtb.com/products/downtube-guard

https://gnartec.com/product/draft-gnartec-mtb-frame-protection-kit/

https://www.lizardskins.com/bike-protection

Kydex

Rockgaurds

ETC.

Posted: Nov 3, 2021 at 18:21 Quote
bentin wrote:
Just a hypothetical, but how much of a safety/rideability/stiffness/durability issue is a crack in the downtube? I mean, the SWAT door is the size of beer can, is another hole on the bottom a life and death sort of thing? I realize that one was meant to be there, and one is from a random failure, but what if I rode my bike with a crack or two in it? I have dental insurance and I've got a few steel bikes that make some suspicious noises from the bottom bracket area and I have yet to turn any of them into dual unicycles.

That sounds like a good question. The problem to figure out I guess would be where on that area of the downtube is the most amount of force or support needed for stability and integrity of the frame? I really don't know enough about it myself, but I'd think that would be the consideration when figuring out how much integrity of total frame stability gets lost or compromised when there's a hole or damage to that part of the frame.

The SWAT doesn't pose any issues of us thinking it's ever going to "expand" or tare any further. It's stable the way it's made or cut, but if there were damage done to the edge of the SWAT where it could separate further would we worry about it then? IDK? I have a Stumpy w/a tough guard there and a narrower tube in the SWAT area, so I don't have the worries the newer EVO riders are having--I'm fortunate I hope..
If the downtube damage or hole is in the center of the tube, does the entire frame remain stable UNTIL that damage extends toward the outer edge of the downtube? That would be the question I guess I'd have about that, but you made a good point, or at least asked a good question I didn't think of either?

~JSV

Posted: Nov 3, 2021 at 20:48 Quote
Has anyone tried a rockgaurdz with some softer padded liner underneath? This would help dampen impacts rather than transfer right to the frame. I know someone on here has used the rockgaurdz and found a crack underneath. I feel like this would be an easier solution than kydex and strapping something to the frame.

Posted: Nov 4, 2021 at 1:23 Quote
Jedimtnbiker wrote:
For those of you who keep asking about possible solutions...

https://raawmtb.com/products/downtube-guard

https://gnartec.com/product/draft-gnartec-mtb-frame-protection-kit/

https://www.lizardskins.com/bike-protection

Kydex

Rockgaurds

ETC.

That's a good list. I would add this to this list https://www.zefal.com/en/bike-protection/510-dt-armor.html

Edit: Also this https://www.alltricks.com/F-41496-protection-velo/P-1970676-rockstop_downtube_protector_for_carbon_frames

Posted: Nov 4, 2021 at 2:32 Quote
I’m going to run the rockguardz over the large lizard skins carbon leather protector. I’ve currently got ithe lizard skins fitted under the stock guard and it seems to be a decent size and toughness etc. The only issue is that rockguardz don’t currently produce one for the S3. They say a couple of people have fitted the S4 one to their S3 and are happy enough. Any of you on here? I’d like to hear about how well it fits/ any modding you had to do?

Posted: Nov 4, 2021 at 3:56 Quote
jimmythesemi wrote:
Has anyone tried a rockgaurdz with some softer padded liner underneath? This would help dampen impacts rather than transfer right to the frame. I know someone on here has used the rockgaurdz and found a crack underneath. I feel like this would be an easier solution than kydex and strapping something to the frame.

Yeah that was me that had the rock bounce and crack both the rock guardz and frame underneath. I have an S4 and the Rock Guardz fit very tight, you could probably throw some mastic tape or something between the two parts but the only caution is its a tight fit to get the guard to line up with the mounting holes. The Rock Guardz on its own didn't help, sadly they don't recommend any damping or anything between the two so I installed it how it was intended.


 
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