dw link, rp23, and bobbing
Recently got back into mtb’ing on an Ibis Mojo, and do like the bike. However, whilst it doesn’t bounce around when pedalling uphill, if I look down I can see the shock moving rhythmically in time with my pedalling. Ok – time for some propedal – which makes no difference. Bouncing the bike up and down with pp on and off seems to make no difference either. Took it back tothe LBS who said, essentially. “they all do that sir” esp on dw link bikes – and whilst the leverage ratios and shim and dampings will be different, that doesn’t make that much sense to me, really.
Any other Mojo owners out there who can comment, or dw-link owners, or rp23 experts? (and yes, it is set up right for sag, and yes, I’ve tried it on propedal 3 which is max).
thanks for any thoughts…Posted 6 years agod45ythMember
Could something be wrong with the rebound on the shock? In my experience DW link are less prone to bob than a lot of other suspension designs…it’s the way the rotating links counteract each other, because of this they don’t even need a shock with any platform built in! I have a Mojo HD and the suspension is much firmer than my old VPP bike. I only sometimes flick the PP on if doing a long road section.
P.s. I think the bloke in your LBS has been sniffing degreaser!Posted 6 years agoRorschachMember
Just a thought…maybe just maybe its you…. mashing on the pedals like you’re trying to chop wood.Posted 6 years ago
If you really can’t tell the difference between the pro-pedal settings than its eithr broken or you are very insensitive.
Then again I’ve seen people who could make a rigid bob!!!Concentrate on spinning smooth circles…….or buy a fixie to learn how to pedal……or get a lockout.d45ythMember
Even if the OP’s biking name is Stompatron, setting the PP to 3 especially on a DW link bike, should make it pretty much solid. I wonder if he hasn’t enough air in the shock so it feels more active? With the suspension set up on my HD(140), it’s definitely not smooth on the smaller stuff…get on some rougher terrain and it opens up nicely though! 🙂Posted 6 years ago
it may well be me 🙂 however, whilst I’m riding flat pedals and so not as scoopy and lifting as on spd’s, I am reasonably smooth. Do tend to use a lower cadence than many – my legs don’t go round that fast – but I’m not a stomper…..
@d45yth – is it clearly different with pp on – e.g. off the bike and you push up and down on the saddle, can you feel a difference? when pedalling, with pp on (and off, tbh) do you notice the shock moving – say on gentle uphill on smooth terrain, for e.g.Posted 6 years ago
running about 200-210 psi in the shock (am 90 kgs – excuse the mixed units!) – and I fully accept that, as a new bike to me, it’s not tuned in yet. Rebound is about half way, and not quite right yet – would that make the difference I’m seeing?
option is to send the shock off for checking, which the lbs are happy to do (tough not clear who’d be paying :-)) Don’t want to do this if it’s likely to be me tho 🙂Posted 6 years agojuliansMember
I have a mojo HD with an RP23, and it doesnt bob much when pedalling up hill if you sit and spin, if you look at the shock you can see that it does move a little bit . If you stand out of the seat and ‘power’ up the hill it still doesnt move that much.
I cant really tell any difference in pedalling efficiency between propedal on at level 3 and off completely, but if I leave it switched on for a downhill section the bike does feel far less supple over the bumps.Posted 6 years ago
@ChunkyMTB – so is there anything I can do to check this in more detail? Any settings on shock I can adjust to demonstrate it more? Or does it just have to be sent off? One of the LBS’s comments, kinda echoed here, is that on the dw-link bikes it’s not as obvious an effect, cos of the efficiency of the suspension itself…..Posted 6 years agoduirMember
I have the new DW Split Pivot on my Devinci Dixon with RP23. Not sure if yours is split pivot or old DW link but the split pivot has almost zero movement in the climb when it’s smooth but has a lot of small bump sensitivity when the climb gets rough. Maybe just not quite correctly tuned/setup for you so maybe worth a call to TF or a different air can size etc?Posted 6 years agogsp1984Member
How old is your rp23? The does the dial have a 0, 1 and 2 (latest version) or does it have a 1, 2 and 3? (old version)
I have the new version on a single pivot bike and with propedal lever flicked across the bike feels completely different when climbing. I didn’t use it for the first month and was amazed at the difference when I started too. If you jump up and down on the bike the shock is still supposed to move like normal. It’s not supposed to be a lockout.Posted 6 years agothepodgeMember
propedal isn’t lockout. are you sure you not getting confused. the shock / suspension will move even with propedal on.
I was told that the giant version of dw link is so good that they don’t think you’d need a shock with propedal but people thought they were down specing their bikes only putting a basic shock on. so now they supply frames with a propedal shock but with it tuned so low it doesn’t really work (compared to normal shock settings).
could be similar on your setupPosted 6 years ago
@thepodge – don’t think I am getting confused – I know it’s low speed compression only, but would expect to feel a difference off the bike too…. it could well be specc’d to do little, but I can’t see the point in that (though I agree it is done).
@gsp1984 – it’s got 1, 2, 3 – so 3 levels of propedal (in theory) – not like the supposed lockout of the new version. But it’s an early 2011 model, so not that old…..Posted 6 years agoLoCoMember
If you’re worried abou the function of the shock return it to Fox for a warranty inspection (if it’s less than 12 months old) then you’ll know if it’s a fault or a setup issue,
if it’s 12 month old then it’s probably due a service as it may have cavitated, causing the ‘bobby damping’Posted 6 years agovinnyehSubscriber
On my old mojo I never noticed bob, but as said above the shock remains active- are you sure you’re not just seeing it moving cos you’re riding over stuff? If you just lean on the saddle standing by the bike you should be able to feel the difference in the way the shock reacts to the pressure with pro pedal on and off, though I couldn’t really notice it riding the bike- does this happen?
Did you buy the bike new then- there’s not a seal gone or something is there?Posted 6 years ago
How much sag are you running – I ran just under 25% , though I’ve now gone up to around 30% on my mojo hd, and there is a noticeable difference between pp on and off.
@Whyte1 – thanks, will try it like that.Posted 6 years ago
@vinnyeh – it’s ex-demo so comes with full new warranty – hence I want to get it checked earlier rather than later….. so something could be wrong, but may well not be…..
@jameso – could be the case – esp if other mojo owners find the same thing. (Didn’t notice it so much on a pivot mach 5.7 when I demo’d it tho – but didn’t pay as much attention, so doesn’t mean everything…..)ScienceofficerMember
Its interesting to note that you mention you can see it moving as you pedal. Perhaps you’re just over thinking the minor movement that you are seeing?
Have you perceived an actual detriment to your riding, or are you just obsessing like mtber’s do?
The short links do tend to be easier to spot when they’re moving, and in any case, the shop is right – they do ‘all do that sir’, to varying degrees.
However, if mojo don’t down tune their damping, than max pro pedal should make a difference – It still does on my DW 5 spot, so perhaps theres a genuine issue with the shock.
My moneys on the obsessing though. 😈Posted 6 years ago
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