Fix your Rockshox Fork.

Mikerb

E*POWAH Elite World Champion
May 16, 2019
6,628
5,104
Weymouth
For all those less than pleased with their Rockshox fork here are a few low cost fixes.
1. Forks for emtbs are in my opinion often specced with damping too firm/slow, especially for lighter riders. Setting rebound nearly full fast (faster than the classic front wheel bounce test) can help alleviate that.
2. Where only Low Speed Compression adjustment is available (e.g Rockshox charger) setting it to 2 or 3 clicks helps the fork move more readily into its midstroke.
3. Forks specced for emtb often have more air tokens than factory spec. Try removing one or all of them.
4. I suspect many forks are manufactured months or even a year before they are used....by which time it is possible grease has hardened and little if any oil remains. A simple diy lower leg service just to clean regrease and re lube costs very little and is easy to do...and is worth learning because it will need doing once or twice a year.
5. If you have the Debonair airspring upgrading to the 2021 version for c £50 is hugely worthwhile. The fork will no longer have the 10mm sag just under the bikes weight so you gain that 10mm of lost travel....and since that is right at the beginning of travel that is far more significant than it might sound. It also mostly removes the problem of equalisation of pos and neg air chambers. You can opt for the upgrade kit only or get a complete 2021 airspring which then gives you the option of increasing travel if you want. Either way you will be doing a lower leg service as well.
 

KennyB

E*POWAH Master
Aug 25, 2019
824
564
Taunton
Got my upgrade kit coming tomorrow. I couldn't find any UK or European dealer with them in stock so it's been on back order for weeks. Sealhead and foot nut for £26 incl P&P from Brink.
 

Konanige

Active member
Feb 29, 2020
422
336
Mendips
Have never understood why people worry about the fork sitting 10mm into its travel under its own weight, provided you set up sag correctly it is fine, that first bit of travel is negated when the fork is moving over rough ground anyway. Have you ever noticed how much your wheel drops when you jack your car up to change a tyre? The 150mm travel on your fork is a dynamic figure not a static one.
 

Doug Stampfer

Well-known member
Jul 7, 2018
737
756
NZ
Have never understood why people worry about the fork sitting 10mm into its travel under its own weight, provided you set up sag correctly it is fine, that first bit of travel is negated when the fork is moving over rough ground anyway. Have you ever noticed how much your wheel drops when you jack your car up to change a tyre? The 150mm travel on your fork is a dynamic figure not a static one.
Thats exactly what I was thinking. Does the new airspring only matter if you are bottoming out the fork anyway?
 

Mikerb

E*POWAH Elite World Champion
May 16, 2019
6,628
5,104
Weymouth
With car suspension the weight of the car is the sag. Driver weight is insignificant compared to the static weight of the car so it is not a useful comparison. The loss of 10mm travel on a 150mm fork is 15% and of course it is all at the lowest point of the compression ramp. Do the mod and you will discover what a difference it makes.
 

Mikerb

E*POWAH Elite World Champion
May 16, 2019
6,628
5,104
Weymouth
The C1 Upgrade is all about the start of the stroke and the end of the stoke is exactly the same. The shock will sit higher and you will get improved small bump compliance.
Just done the upgrade on my mates Revelation fork. Unbelievable difference probably also helped by the lower leg service done in the process....this was a complete air spring as opposed to the 2 pieces of the upgrade kit but still only £45 and it is the same end result.
 

KennyB

E*POWAH Master
Aug 25, 2019
824
564
Taunton
[QUOTE="Mikerb, post: 200943, member: 3930" this was a complete air spring as opposed to the 2 pieces of the upgrade kit but still only £45 and it is the same end result.
[/QUOTE]
Upgrade kit arrived today from Brink. It's 3 pieces, foot nut, seal head and quad seal for the air piston. Happy days.
 

Mikerb

E*POWAH Elite World Champion
May 16, 2019
6,628
5,104
Weymouth
Ah...did not know the quad seal was included! Dont forget to thread lock the foot nut.
 

Konanige

Active member
Feb 29, 2020
422
336
Mendips
Your sag has nowt to do with suspending your weight, it is for extension into compressions in the trail to keep the tyre in contact with the ground. I would suspect the better small bump compliance with the upgrade kit is more to do with the new seals that come with it producing less stiction.
 

KennyB

E*POWAH Master
Aug 25, 2019
824
564
Taunton
Ah...did not know the quad seal was included! Dont forget to thread lock the foot nut.
Not did I, it's always been shown as 2 piece. RS recommends red Loctite which seems to cost almost as much as the upgrade kit. I got some lesser known brand on eBay for a few quid. I reckon blue would have been ok. My reasoning breing that once the external bolt is torqued up, the foot nut is pretty much locked onto the lower legs, needing a solid tap with a hammer to free it. However I decided not to risk it too much.
 

Mikerb

E*POWAH Elite World Champion
May 16, 2019
6,628
5,104
Weymouth
The red is semi permanent and a stronger bond. With the foot nut and allen bolt both being right hand thread (correct?) you do not want the foot nut unscrewing rather than the allen bolt when you next service the fork.
 

IMeasureStuff

Member
Aug 9, 2020
34
36
Australia
[QUOTE="Mikerb, post: 200943, member: 3930" this was a complete air spring as opposed to the 2 pieces of the upgrade kit but still only £45 and it is the same end result.
Upgrade kit arrived today from Brink. It's 3 pieces, foot nut, seal head and quad seal for the air piston. Happy days.
[/QUOTE]

Are there any tutorials or tech manuals that show the process of dismantling the original air spring and reassembling it with the new parts?
 

KennyB

E*POWAH Master
Aug 25, 2019
824
564
Taunton
Yes, on SRAM's site there is an upgrade manual that covers all sorts of fork stuff, including this. You tube only covers the complete assembly. If you can't find it come back on this.
 

Mikerb

E*POWAH Elite World Champion
May 16, 2019
6,628
5,104
Weymouth
no need. Just remove the existing foot nut and slide the existing seal head off the shaft....slide the new seal head onto the shaft ( flat section up towards the piston, put the new (red) foot nut on using red loctite or equivalent thread lock. Never done the quad seal but I assume it eases off perhaps using a spike and slide the new one on. Apply SRAM butter sparingly to shaft and seals.
 

IMeasureStuff

Member
Aug 9, 2020
34
36
Australia
Yes, on SRAM's site there is an upgrade manual that covers all sorts of fork stuff, including this. You tube only covers the complete assembly. If you can't find it come back on this.

Found the manual, very comprehensive.

I have 1 question. On page 16, (Debonair Spring Installation) item #2 Apply 0W-30 suspension oil to the spring shaft above the seal head.

I can see the picture.

But I'm not exactly sure where they are applying the oil. If you could explain that it would be much appreciated.
 

KennyB

E*POWAH Master
Aug 25, 2019
824
564
Taunton
This is a wee bit (0.5ml) of oil, same stuff as for the lower legs. It goes just above the new sealhead, where the shaft goes in to it, so under the piston.
 

p3eps

E*POWAH Elite World Champion
Subscriber
Dec 14, 2019
1,983
2,405
Scotland
I have the 2021 upgrade kit and new seals / oil etc arriving from J-tech tomorrow.
Never serviced a fork before... but have serviced loads of oil and gas pressure equipment - so assuming it’ll be straight forward enough if I follow the instructions!!

What number is the loctite I need?
 

IMeasureStuff

Member
Aug 9, 2020
34
36
Australia
I have the 2021 upgrade kit and new seals / oil etc arriving from J-tech tomorrow.
Never serviced a fork before... but have serviced loads of oil and gas pressure equipment - so assuming it’ll be straight forward enough if I follow the instructions!!

What number is the loctite I need?

Loctite 2760 or 270 High Strength Threadlocker Red
 

Hamina

E*POWAH Master
Mar 22, 2020
500
396
FIN
5. If you have the Debonair airspring upgrading to the 2021 version for c £50 is hugely worthwhile. .

One might want to look what’s written on the other forum about this upgrade. Maybe not so obvious upgrade as it seems or is it? :unsure:

 

Doug Stampfer

Well-known member
Jul 7, 2018
737
756
NZ
One might want to look what’s written on the other forum about this upgrade. Maybe not so obvious upgrade as it seems or is it? :unsure:

What was the actual conclusion at the end of the discussion? My eyes started to glaze over with graphs & stuff.

Back in my motorcycling days I bought a suspension gizmo that was sposed to stop brake dive on a budget fork for a budget bike. They were touted as really good & made untold difference when people rode them. I got one but didn't notice the difference & put it down to my skills & perception not being as good as the other more experienced riders. I then did some experimenting with the fork to get real life data before & after fitting the gizmo & found absolutely no difference in what it was sposed to do. I broached this with the motorcylce forum & it didn't go down too well. A while later a local suspension guru got one & put it on his expensive testing machine & found that it didn't work & gave feedback to the manufacturer why it doesn't work & how it never would work. They didn't bother replying to him.
My point is I think if people spend money on something they are less inclined to say it doesn't work as it's sposed to. In this case what I mean is does it actually improve suspension or merely raise the forks up a bit?
Over here in NZ they're nearly $100 so not as cheap as in England or the States.
 

slippery pete

Well-known member
Oct 29, 2019
163
241
Scotland
What was the actual conclusion at the end of the discussion? My eyes started to glaze over with graphs & stuff.

TL;DR

For ebikes the C1 spring may be a really good thing. For normal bikes it is more of a mixed bag depending on what might have been compromised on the previous spring. {FWIW, I'm responsible for some of the MTBR graphs but (as is tradition) any facts have been dutifully ignored in favour of subjective ignorance)
 

S D

Active member
Mar 26, 2019
191
124
Shelley
Just done the upgrade on my mates Revelation fork. Unbelievable difference probably also helped by the lower leg service done in the process....this was a complete air spring as opposed to the 2 pieces of the upgrade kit but still only £45 and it is the same end result.
Where to buy this piece of kit please?
 

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