10/26/2022 0 Comments Psi cyndicate![]() ![]() I’d bet money on getting a phone call “I bought a bike from you a month ago and I got a flat today and my brother’s friend’s cousin’s uncle told me my wheels are two DIFFERENT sizes! I need to talk to manager, this is ridiculous”. Trying to explain the advantages of two different size wheels, best of luck getting the customer to actually internalize their bike has two different size wheels. ![]() Trying to explain the word Geometry, let alone what a head angle is to the vast majority of customers is like banging your head against the wall. After all, your spending top dollar on a bike, dont you want to make sure the people who designed and built it were certain it's dialed? you know how I can tell you’ve never worked in a bike shop? However, I would expect to see some time and some real world data applied before it gets released to the public. Santa Cruz probably have the most dialed setup compared to every other company right now, somtheir transition into mullet is expected. Just because a 29er behaves one way and a 27.5 bike behaves another isnt a simple case of meet in the middle. ![]() Santa Cruz were the first to the party to introduce the 29er to racing, yet were among the last to release to the public. The companies who jumped on producing 29er DH bikes felt some pain (commencal is a perfect example of this) and thus have since redesigned the bike after some significant data acquisition under Amaury Pierron. The incarnation of 29" wheels were no differant. Problem here is creating a bunch of casts for lowers gets expensive, and given that the prototype was a modified 27.5 fork, the results were skewed. They chose 58mm based off the numbers related to wheelpath saying it's better, rather than truly doing some significant testing. The initial tests were done on a modified 27.5 fork with the arch machined out and an offset of 52mm. A perfect example of this is fork offset. This is also the key fundamental behind everything in downhill racing today. ![]() Currently the number one traded thing in this world is Data. So let's take a few things into consideration here. 30% is average, but probably the maximum you wanna go in the rear. The other things to consider is your sag front and rear on the bike. Rebound is directly related to spring rate, so the deeper the bike goes into the travel, the faster it will recover, and it should gradually get slower until the end of the stroke. It should feel slow returning the first inch or so. The harshness your experiencing isnt necisarilly spring rate or compression, it's probably rebound. In turn the slower your rebound to prevent the bike from hopping around. Ultimately the faster you go, the firmer your setup will need to get. One advantage to the newer VVC style grip 2 will be the allowance of more HSC without the harshness, and the ability to open up the LSC with a better platform to prevent the fork from diving. I'm 215lbs, and run 95psi with 4 tokens and my LSC two clicks open from closed, HSC wide open, HSR 3 clicks from closed, and LSR closed. To offset this, increasing the spring rate to increase mid stroke support is necisarry to prevent the fork from diving. One thing to consider is the HSC setting is harsh on these forks and running wide open is preferred for heavier riders. The other things to consider (which somebody cleverly pointed out) hes counting over 8 clicks of HSC on the fork making this a first gen grip 2 damper. This will give the bike a more lively poppy feel. I would assume hes in the 10%-12% sag up front. Greg running a 575 in the rear at 185lbs would put him in the range of about 18%-20% sag. Sounds to me like this is minimal volume spacers at a high sag point. There are many variables to consider like volume spacers, is this the new evol spring or old one, and sag ect. ![]()
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