IQ?... You bring up a great point that a coil spring shock will keep it's ride height if blown... which is not the case for an air shock with a blown air camber or leaking shaft seal.
Do not confuse the Walker Evans "Air" shocks, which are standard on the Dragons, with the Walker Evans Coil-Spring Needle shocks which are included in the topic of this post.
The Walker Evans Coil-Spring Needle piggyback are the same design as the podium winning shocks on the IQ-Racer for the last 6 years...the difference is in the length, spring rates, and valving.
The Walker Evans Needle shocks, the Fox Zero Pro Shocks
ARE Coil Spring shocks as are the Ohlins.
I really like the quality of Ohlins which were great on my Ducati. In fact the machining work on the Ohlins is industry standard!
The shock is only as good as the valving and spring choices...
I'm not aware of any volume suppliers that have a lot of seat time and tuning on the Ohlins for the long track RMK's in all their different variations.
Both Coil Spring shocks in discussion here....the Fox Zero Pro's from Carls and the Walker Evans
Needle shocks are custom valved and dialed in for this chassis, and the tuners have experience with all of the differnt versions of the RMK's.
The Fox Zero-Pro Coil-Spring shock from Carls is a Coil Over custom shock that costs about $560 for the pair, has single rate springs, 1/2" shafts, standard IFP design (no piggyback and no compression adjustment).
The Walker Evans Coil-Spring Needle Shock from Tri City Performance cost about $650, have dual rate springs, 5/8" shafts, Piggyback reservioir design with compression "clicker" adjustment and position sensitivity.
Two different prices, two different options. Both great shocks set up by people who know how to valve/spring shocks.
The new 2010 Assaults already come with the Premium Walker Evans Coil-spring shocks...but they dont benefit from the dual rate springs or the custom valving that the Aftermarket Walker Evans shocks have from Tri City.
The Assault and IQR Walkers Needle Coil-spring are too long and not valved/sprung correctly for the Dragon sleds...For those that are thinking of the swap.
This is the
Walker Evans Coil-Spring Needle shock shown with the stock single rate spring on a 2009 Dragon SP.
This is a
Fox Zero Pro shock from Carls.