The Enginerd's Forum Activity

Reply to Minion dhf wt aired up dimensions 5/8/2017 11:04 AM

On a 584mm diameter, 30mm i nternal w idth rim, I have measured the below on a 2.5WT DHF at 40psi after some initial stretching: Tread width: 2.49" (63mm) @ 683mm diameter

Reply to How to be a better rider 9/16/2016 10:24 AM

The dicking about picture is hilarious

Reply to Question for enduro racers: One day vs Multi day 8/30/2016 3:39 PM

In general, I prefer 1 day formats due to the vacation time issue mentioned. Otherwise, people with more time off get an advantage by showing up to practice on Thursday, easy practice on Friday, and then they're more fresh for racing. However, it's still ... more »

Reply to 2016 UCI Downhill World Championship Teams and Riders 8/18/2016 9:35 AM

^^^ This. If Hill doesn't make it to World Champs, that sucks, and it would seem like the end of an era. But, keep in mind, bumping the "next Sam Hill" from the World's team to let somebody else in that hasn't been performing as well doesn't make sense. ... more »

Reply to Time to Say Goodbye to USAC? 7/20/2016 9:40 PM

I stopped buying a USAC license or racing USAC races a couple years ago because I was tired of this crap.

Reply to The Patent Thread - New and Wild Mountain Bike Inventions 4/1/2016 12:37 PM

We'll be heading down to the patent office this afternoon for this bad boy: https://vimeo.com/161139993

Reply to Best Colorado Bike Parks 7/15/2014 3:38 PM

This ^. I would recommend one day at as many bike parks as possible vs multiple days at one place. Keystone, Steamboat, Trestle/Winter Park, Crested Butte, etc are all fun.

Reply to Why are flat tires something we still see these days? 6/27/2014 7:24 AM

Probably not. He said himself it was the first flat tire he's had in a race. If he would have been running an extra 4 lbs of rotating weight at the tire for all of his World Cup races, he wouldn't have flatted at Leogang, but he also most likely wouldn't ... more »

Reply to why doesnt anyone use dual rate springs in mtb 6/26/2014 3:02 PM

On a coil sprung fork, yeah, it would make sense to have a progressively wound spring, which is common on motorcycles. It seems MTB forks are gravitating towards air springs, even for DH, though. Then, air volume can be adjusted for the same effect, ... more »

Reply to why doesnt anyone use dual rate springs in mtb 6/26/2014 2:21 PM

That's a leverage curve issue. Air shocks have had an overall similar spring curve shape for a long time. The frame should be designed around it, if it's designed to use an air sprung shock. You can make a frame with good small bump compliance that uses ... more »

Reply to why doesnt anyone use dual rate springs in mtb 6/26/2014 2:19 PM

That's the design philosophy that I used on the Guerrilla Gravity GG/DH, except I went one step further. No linkage, progressive leverage curve, standard coil shock.

Reply to why doesnt anyone use dual rate springs in mtb 6/26/2014 2:06 PM

Cars and trucks generally have a lot more limitations with packaging, and don't have the luxury to move the shock around to modify the leverage ratio curve (although they call it Motion Ratio or Installation Ratio in the automotive world) as much. Even ... more »

Reply to Why are flat tires something we still see these days? 6/24/2014 8:49 PM

As much of a pain that pneumatic tires are, using air as a spring is very light weight, low rolling resistance and able to be tuned for stiffness (ie tire pressure). The "tweel" design will most likely always have higher rolling resistance and probably ... more »

Reply to Over-coming fear?? 1/31/2011 9:22 PM

I take my fingers off the brakes, that pretty much always does the trick.