zenout

Just did my first ride with these new tires and the first thing i noticed was how quiet they were.Stuck to road great and really responsive on turns.Those of you who use this tire, I was just wondering if you run them on 110 psi or 120? I'm not a racer, so I realize it might not matter.Would 120 psi put the side wall at risk more as i hear its the only negative if there is one at all.Thanks all.

chefxian

I use GP 4000's on all my bikes except on race day. Personally, they are some of my favorite tires next to the high end Vredesteins. I think weight is also a factor. I run my stuff at 120 and 115 in the front. Its not from a nuclear tested pump but it does say Specialized on it. If you are light and you run a high PSI the ride will be rougher as mentioned above. The other problem is running tire pressure too high will affect the rolling resistance as well. These tires feel great when they are brand new. Hit ACH downhill on a warmer day and they stick like glue. So fun and so fast.

robertkat

Ouch! Why on earth anyone would put 120 psi in clincher tires is beyond me. The label on the sidewall is a recommended maximum. I use the 23mm 4000S at 90-93 rear, 85-90 front. They are fast, stick to the road, and still have a little give when it's rough. And actually, lower pressures allow your tire to deform more, making it roll faster. The only reason I can think of for high pressures is if you are really heavy, but in that case one ought to be using a wider tire, not using a higher pressure.

chefxian

Well, for one I weigh 185. 120 is more than acceptable and actually you can run them higher than that. For me, running them less than that feels slow. So perhaps its a preference thing. So this is my reason on the earth to run my tires at 120 and to have everyone question why.

spinerguy

I run mine at 100psi, my weight is 140 lbs. I believe there's very little to gain at higher pressure, as far as rolling resistance is concerned.

Juha

This thread is momentarily closed for maintenance.

--J

Juha

And we're back open. If you find your post edited or missing, it was because you were either out of Guidelines or replying to an out of Guidelines post. Here's the relevant part:

I'm sure there's a way to discuss tyres and tyre pressures without venturing outside of Guidelines. Please keep it civil from now on.

Any questions or comments, PM me. Thank you.

--Juha, a Forum Mod

Siu Blue Wind

Thank you Juha. Six Jours, please leave this thread.

Tank_67

I run my tires on the recommended PSI by the manufacture.

Biker395 

FWIW, I'm about 160 and run mine at 105 psi.

They're rated 110-120 (and hence, capable of much more than that), so my advice is to ignore all the advice. Try it for yourself and see what you think.

Rick@OCRR

What tire (or tyre) pressure a cyclist uses is totally a matter of personal preference combined with the recommendations of the manufacturer.

Lately (last few years) though, I have noticed a trend toward lower pressures and wider tires overall. I use Gatorskins since they have beefier sidewalls (yes, with a weight penalty, I know), and I weigh 160 and run 110psi. rear, 100psi. front.

Oh, and my pump has not been certified, but it says "Joe Blow" on it, so that's almost the same thing. Right? Oh well, maybe not.

Rick / OCRR

Biker395 

^ Lol.

Seriously, it's not like I have a big preference one way or the other, and I suspect it's the same with most people. I just pump them up somewhere in the middle of the recommended range and leave it at that.

BTW, FWIW the Kevlar Gatorskins are actually pretty close in weight.

4000S = 205g
Gator Kevlar = 230g
Gator Wire = 280g

(700x23c)

TJClay

Hey, Joe Blow autographaphed my pump too!!

kenrudman

I run the Conti 4000s in the 700x25 size at 95 rear and 90 front and love the feel of them. I currently weigh 195 and like sunsets and long walks on the beach. Turn offs are internet douchiness and people who don't hold doors open.

Garfield Cat

Is he connected to the Plumber?

Rick@OCRR

No, but he's connected to Topeak.

Rick / OCRR

cutterfilm

I love the Conti 4000s 23. I'm on my 2nd set. Pressure is going to vary based on riding style, road conditions and weight. I'm 155 and ride them at 105 rear and 95 front. If the pressure is much less, i end up with flats from these crumbling LA roads. I ride decently aggressively in my crosstown commutes. More important for me is to top them off daily.

And though I love these tires, has anyone switched from these to something they thought was better?

Dunbar

Can any west siders let me know how the GP4000s holds up in the flat resistance department? I just moved to Santa Monica and the poor condition of roads make my 25c Durano Plus's feel they're made out of solid rubber.

Biker395 

They hold up as well as anything else I've used. Not quite the flat resistance of the Gatorskins, but close, IMHO.

zenout

Just hit 500 miles on them they are great and no flats..My bike feels quicker out of the hole but of course i could be imagining it...But that works too.

MikeEckhaus

I switched from Gatorskins to the GP4000s about a year ago. I don't get the same life with the GP's, of course, but I noticed ride and handling improvements. I run mine at 120 rear, 110 front, but I am over 200 lbs and our local roads are pretty smooth. The bike shop had a chart from Continentaly that actually showed the GP's having better flat resistance than the Gatorskins, although I can't find that chart on Conti's webiste. I think they are about the same, personally.

Genaro

For those who don't have the $$ to shell out on the 4000's, I've been having really good luck running these Performance house brand tires.

https://www.performancebike.com/bikes...5#ReviewHeader

I usually get alot of flats , but haven't gotten one since I put these on, about 500 miles). I don't notice much difference in rolling resistance, but then again, I've never ran high quality tires to comapre to and I don't know how long they will last. I would say that these are really good economical puncture resistant tires.