Clydesdale PSI

[rupped]

I didn't want to highjack the other PSI thread, so this is my first ever New Thread :-)

I'm currently 230# (trying to get to 210#, I'm 6' 4"), dual susp (Giant NRS2, 2.1(?) IRC Mythos w/ tubes) . I have been running about 40 front and 50 rear. I have been experimenting with lower pressures in the rear after reading about the pressures folks are running here. I get very visible sidewall deflection at 40psi in the rear, and it feels squirrelly. What pressures are similarly gravity challenged people using? I consider myself reasonably smooth, with the occasional boneheaded move.

Thanks for any help!

BTW - This is a great board! I lurk on a daily basis. I've been riding a MTB around here for nearly 20 years (increasing age requires getting serious about it again) and have learned about lots of places I didn't know about from you guys.

[phuncadelic]

I am about 6'2" 215-220 depending on the day and I keep my pressure about 35 in the back little less in the front depending on the conditions. I have a ht fisher 29er.

[DMarchy1]

As you are riding a dual suspension bike, the tires duty is to support your weight and grip the surface. The rear shock is supposed to smooth out the ride. However the NRS is a very very firm riding suspension. I would raise the pressure to 46 lbs and see if the squirrlyness goes a way. If not raise by 2 lbs until it does. If it went away at 46 decrease by two lbs till it comes back. Then raise 1 lb to the sweet spot. This will give you the firm handling low rolling resistance. However you may get an eternity of harsh riding in return. Slightly lower pressure can greatly reduce the small bumb chatter and reduce rider fatigue on less than smooth trail surfaces. It is a very subjective thing. Dave M.

[deansidr]

About 6'4" and weigh about 205. I have a FS and play around with the different PSI's in the tires. I usually run it around the 40 mark and it seems to work pretty well for me.

[pepelkod]

Im only a lowly 210#, however I run IRC Seracs (great tire if you can get them mounted) and never squirreld with 38-40psi.

I found that Pararacer Smokes were alot more sketchy because they slid, not because the rolled sideways. Be sure to determine if it your tire flexing (rolling sideways) or sliding. Be sure your tires beads are locking into the rim. You can set the bike on a steep piece of terrain sideways and sit on it. Have a friend look at what the tire is doing.

Lastly try diff tires/tubeless.

-D

[dcraider]

I'm 6'5" and currently 205 without gear, 215 or so with gear. I normally run abiut 30 in the rear tire, moto raptor 2.24, and 26 or so in the front, moto raptor 2.4. Occassionally I will increase or decrease pressure based on trail type. At Rosaryville I run about 36 - 40 on Panaracer XC pros 2.1, and at Gambrill I run just less than 30 in both tires, using the moto raptors.

Pressure for a clydesdale, i'd say, is dependant on terrain and the type of riding. If you do more XC than technical riding you're probably better off with a higher pressure 40 - 45. If the tire feel squirrley, it may not be the pressure, it may be your riding style (weight control) in the corners. At 230 it's easy to toss that weight around on a 28 pound XC bike.

Keep cranking.

Kris

[halfinch]

i hover around your weight and have run irc's around 42 to 25 pounds. too much more and they bounce.

being a clyde, i do check the pressure everytime i ride.

welcome to the group.

[Snot-Rocket]

But naked! I run between 35-40 PSI in the rear depending on the tire and conditions. Typically I run 32-35 in the front depending on tire and conditions.

Being Fat- you really have to pay attention to MTB Gear- bikes, accessories and clothing are made for stick boys and gals.

Per 26" tires- I always ran fatter tires like 2.4" motoraptors- they were fast, predictable, worked all around enough for me and allowed me to ride tire pressures that maxed out traction.

Another fat boy issues is balancing tire pressure and tread characteristics- I think this is a serious issue for fat boys- like tire knobs are designed for stick boys and I swear the characteristics of the tire was not designed for folks like us in mind.

Per a dually, you should ensure you suspension is set up well for your before getting into judging tire pressure...

Joy