Continental GP 4000 folding tyres - Page 3

Albert 50 · #31 09-26.-2006

Quote:

Originally Posted by dhk2

Slightly off-topic, but are you sure you need to run max rated pressures? On the side of the 4000 box, 110 psi is listed as the recommended pressure. 120 lbs is the max inflation rating, not what's recommended. Believe I read that Conti does their rolling resistance ratings at 110 psi, and their cut-resistance ratings at 95 psi.

I quit running max pressures several years ago when I read that ride, roadholding and high-speed handling was more secure at 100-105 psi than at 120. After trying 100 psi, I was hooked. Also find many fewer puncture flats and cuts at the lower pressures. Coasting side-by-side with buddies, haven't been able to notice any difference in rolling resistance either. On high-speed descents, lower pressures allow the tires to stay firmly planted on the road which seems to add more speed and security.

+1.....& faster/lighter tyres do not = long lasting, at least not on the back. I'm considering going back to a Specialised Armodillo on the rear.

mikesbytes · #32 09-26.-2006

Quote:

Originally Posted by RidingPowerlift

I have done Mt Wellington from "The Springs", (about half way up, but it's the harder half and great fun on a frosty morning!!).

re the tyres, I think it was a combination of not paying attention to detail, eg, I didn't straighten out the kinks (and it was flippin' cold here in Hobart so one probably let the tube through), and I didn't check that the tube wasn't pinched. So... all should go well at 120 lbs tomorrow.

You must be tougher than me, it was hard enough in the car !!!!!

RidingPowerlift · #33 09-26.-2006

Quote:

Originally Posted by dhk2

<snip>Slightly off-topic, but are you sure you need to run max rated pressures? On the side of the 4000 box, 110 psi is listed as the recommended pressure. 120 lbs is the max inflation rating, not what's recommended. Believe I read that Conti does their rolling resistance ratings at 110 psi, and their cut-resistance ratings at 95 psi.

I quit running max pressures several years ago when I read that ride, roadholding and high-speed handling was more secure at 100-105 psi than at 120. After trying 100 psi, I was hooked. Also find many fewer puncture flats and cuts at the lower pressures. Coasting side-by-side with buddies, haven't been able to notice any difference in rolling resistance either. On high-speed descents, lower pressures allow the tires to stay firmly planted on the road which seems to add more speed and security.

120 on both front and rear was very rattley yesterday! so I dropped to 110 in the front and stayed with 120 in the rear and it was a much nicer ride this morning. And with no wind from the roaring forties I did it to work in record time! I'll try 100 on the front tomorrow.

dhk2 · #34 09-26.-2006

Quote:

Originally Posted by RidingPowerlift

120 on both front and rear was very rattley yesterday! so I dropped to 110 in the front and stayed with 120 in the rear and it was a much nicer ride this morning. And with no wind from the roaring forties I did it to work in record time! I'll try 100 on the front tomorrow.

Yeah, bet you'll like 100 psi in front even better, with no loss of speed. The 4000s seem to be a ride a touch smoother than the 3000s, and according to the Conti webpage, have rolling resistance about 1/3 lower as well.

Can imagine you get some pretty stiff breezes in Tasmania. "Roaring Forties" sure make for a lot of drama in the Round-the-World yacht races in the Southern Ocean.

Albert 50 · #35 09-26.-2006

Quote:

Originally Posted by RidingPowerlift

120 on both front and rear was very rattley yesterday! so I dropped to 110 in the front and stayed with 120 in the rear and it was a much nicer ride this morning. And with no wind from the roaring forties I did it to work in record time! I'll try 100 on the front tomorrow.

Your weight is important when optomising tyre pressure for certain road surfaces....how heavy are you?

RidingPowerlift · #36 09-26.-2006

Quote:

Originally Posted by Albert 50

Your weight is important when optomising tyre pressure for certain road surfaces....how heavy are you?

I'm about 96 kilos including clothing and backpack...

mikesbytes · #37 09-27.-2006

Quote:

Originally Posted by RidingPowerlift

I'm about 96 kilos including clothing and backpack...

At 96, I wouldn't go lower than 110 in the front. 110 sounds good to me.

li rider · #38 09-27.-2006

I replaced my Conti 4 Season with the 4000 and yes, they were a much tighter fit.

My problem was when I installed them, I did so backwards. I had to take them both off and reinstall.

When you install, look for the arrow and be sure they are rolling in the right direction.

Quote:

Originally Posted by otherworld

I’ve got gp4000s off ebay as well and they are VERY tight on the rim… much tighter than the gp3000s they replaced. Maybe it could be that some of these tyres on ebay are factory seconds and are outside the normal size tolerance. Could be that you got a loose one and that’s why it’s popped off if it’s not your rim. I think it’s most likely though that you pinched the tube. In any case I wouldn’t be putting a tyre that you are suspicious of on the front wheel. Your best tyre should always be on the front.

I’d be interested to know anyway if anyone else has found that 4000s are tighter fitting than other Contis

Cheers Jay.

dhk2 · #39 09-27.-2006

Quote:

Originally Posted by mikesbytes

At 96, I wouldn't go lower than 110 in the front. 110 sounds good to me.

Yeah, agree at 96kg, 110 is probably just right in front. Maybe go with 115 in back. I'm 81 kg; 100 in front and 105 rear seems about right to me. At some point, it's just down to personal preference, just like tire pressures on a sports car.

Also good tip from li rider about the directional arrows on the 4000...I did the same thing when I installed mine first one on the front wheel

The arrow isn't that easy to see.

Will be interesting to find out if the mileage is as good on the 4000s as the 3000. I was getting 3000 miles on the rear tires, which seemed pretty good.

colin nago · #40 09-28.-2006

Are the 4000 tyres better than the 3000?

im still using 3000's and don't know whether to get 4000's or michelin pro race 2.

dhk2 · #41 09-28.-2006

Quote:

Originally Posted by colin nago

Are the 4000 tyres better than the 3000?

im still using 3000's and don't know whether to get 4000's or michelin pro race 2.

The 4000s have more of a slick tread than the 3000s. Conti webpage says the new 4000s have rolling resistance reduced by 1/3 over the 3000s, which would put them down in the territory of the Pro Race2. Believe they might be a touch smoother riding than the 3000s as well, but that could just be the power of advertising working.

Both the 4000s and ProRace 2 are great tires, but my impression is that the Michelin is a less durable tire, both in wear life and in puncture/cut resistance. I've only ridden the original Pro Race, not the 2, so maybe Mich have toughen up the new model. Also could be that I've just had bad luck when running the Pro Race, but have had to toss them out due to cut-throughs before getting full tread life.

Suggest you try them both, ride them until they are worn out or damaged, and decide for yourself.

artemidorus · #42 09-28.-2006

Quote:

Originally Posted by colin nago

Are the 4000 tyres better than the 3000?

im still using 3000's and don't know whether to get 4000's or michelin pro race 2.

Do you have a mate called Piero Relli?

mikesbytes · #43 09-30.-2006

Quote:

Originally Posted by colin nago

Are the 4000 tyres better than the 3000?

im still using 3000's and don't know whether to get 4000's or michelin pro race 2.

There are a number of improvements in the 4000 over the 3000, most significantly puncture resistance.

I compared the 4000 with the pro race 2 and concluded that they were approximately equal, so its personal choice. pro race 2 is AU$6 cheaper than 4000 at www.probikekit.com

fabiosav · #44 09-30.-2006

I blew out Michelin's twice and said "enough". Switched to Conti 3000, then 4000, and love 'em. NEVER a problem, one flat.

jcjordan · #45 10-01.-2006

Quote:

Originally Posted by otherworld

I’ve got gp4000s off ebay as well and they are VERY tight on the rim… much tighter than the gp3000s they replaced. Maybe it could be that some of these tyres on ebay are factory seconds and are outside the normal size tolerance. Could be that you got a loose one and that’s why it’s popped off if it’s not your rim. I think it’s most likely though that you pinched the tube. In any case I wouldn’t be putting a tyre that you are suspicious of on the front wheel. Your best tyre should always be on the front.

I’d be interested to know anyway if anyone else has found that 4000s are tighter fitting than other Contis

Cheers Jay.

The GP 4000's are a bit tighter then the 3000's.

You also need to be careful of any tire off ebay, there are a large number of counterfeits for sale. You are much better off purchasing from one of the stores in the UK, you will pay the same amount (less quite often) and you have some recourse if the tire is not quite right.

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