[Tazio]

Hello there I have been running on schwalbe pro one tubeless last year but have decided as I have a side wall slash to return to tubes as I have to replace the tyres .

I do a mix of sports touring and general road cycling have been looking at the continental gp5000 700×30 any comments on these ? Also what sort of pressure can I run these at ? i weight only 75kg I know I will have to run these higher than my tubeless pro ones but on the conti website they suggest for the standard clincher 102 PSI which seems very high and I assume will give a pretty harsh ride .

Topic

[kil0ran]

Good luck finding some
Good luck finding some GP5000s. And equally good luck in getting them on your rims, man they’re tight

[dabba]

I’m 73kgs and run Conti GP

I’m 73kgs and run Conti GP 5000 700×28 on the carbon and titanium road fleet, all at 90-100 psi. The steel ebike and titanium tourer both wear 700×35 Conti Top Contact 2 at 80-85 psi regardless of load. I’ve had the tour AUW up to ~130 kgs on occasion in Australia, so a lot of variability is affected by the amount of camping gear and water that I’m carrying. Normally I’ll carry 3-4 litres of water for a day, but it’s been as high as 8 litres for temperatures up to 40°C and depending upon the distance. I’ve been using both of these tyres for a few years and have been pleased with their puncture resistance, durability and low rolling resistance. 

I’ve tried lowering the pressures to the various recommended levels, but all of the bikes felt not as surefooted as they are with the higher pressure. I guess the pressure ultimately comes down to how comfortable you feel riding at the different pressures.

[ktache]

Hey, when using the

Hey, when using the calculator, it gives me roughly what I have found works for my 2.1s on my 26 inch bikes.

Gets a nod from me.

[andystow]

Here’s a new tire pressure

Here’s a new tire pressure calculator based on the experiments Jan Heine has done on real roads.

Tire Pressure Calculator

Here’s an article on the science behind it.

Tire Pressure and Performance

[SilverBugle]

I have GP5000 32 (rear) and

I have GP5000 32 (rear) and Shwalbe Pro 30 (front) on my road bike, both with tubes (rim is Mavic Open Pro so quite narrow). I run them both at 70 psi and 2 years in performance and puncture resistance has been very good.  

[jaysa]

Similarly, been running

Similarly, been running gp5000 700×25 clinchers on deep carbon rims. At 63kg bodyweight, 70F 75R is a good balance between roadholding and speed for me …

100psi for 700×30 sounds nuts unless you’re riding a lorry instead of a bike!

[IanMSpencer]

Have to agree. Not sure what

Have to agree. Not sure what Conti are on with their web site magic pressure number with no explanation.

Mind you I was equally baffled by Hunt wheels who on their All Road 30 claim it is good for 100psi with 28s, but mysteriously with 30-32mm they mandate a maximum pressure of 70psi – which then drops to 50psi at 33 – baffling that a 3% change in tyre diameter needs a 25% reduction in tyre pressure. I have some 38s with a recommended pressure range of 50-75psi and Hunt are saying maximum of 45psi. They also don’t say whether this is for tubed or tubeless, though they do explain why lower pressures are better.

WIth tubes, aside from feel, you do have to be conscious of how the tyre deforms on hitting a pot hole – too soft and it is welcome to the world of snake bite punctures. One of the joys of tubeless is riding fairly soft without the risk of a snake bite, in fact I tend not to worry to much about avoiding minor potholes these days aside from taking weight out of the saddle.

[Simon E]

With a rider weight of 75kg

With a rider weight of 75kg and tyre size 700×30 with inner tubes I’d suggest you start with:

60 psi (4.1 bar) front

65 psi (4.5 bar) rear

Adjust each in 5 psi or 0.5 bar steps either side and go with what you think feels best, don’t take anyone else’s preference as gospel. Tyre sidewall numbers are irrelevant (though I wouldn’t exceed the max).

If you add panniers or backpacking bags then ~10 psi more in the rear would be a good idea.

[Anonymous]

Had gp5000s 700×25 on my
Had gp5000s 700×25 on my roadbike over a year no problems. And got a pair in 700×23 on my tt also tried pirelli p zeros on tt.
Pressure wise I just pump everything to 100. Can get bumpy

[emjay49]

If you have slashed the
If you have slashed the sidewall then it makes no difference what tyre your running. I’ve been running Pro Ones Tubeless for years and they are no better or worse then any other premium fast tyre for damage. Going back to tubes will only increase the chances of a ride spoiled by a puncture

[hawkinspeter]

I’m sure you know, but Pro

I’m sure you know, but Pro Ones are known to be delicate, so maybe try out the tubeless GP5000s if you want the benefits of tubeless with a bit more robustness.

[Spangly Shiny]

https://cycling-sport.com/en

https://cycling-sport.com/en/resources/tire-pressure-calculator

[Author]

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