Replacement for GP4000s?

Mr Purple
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Re: Replacement for GP4000s?

Postby Mr Purple » Mon Feb 14, 2022 7:50 pm

Good thought but no. Just a chain clean every few weeks with the blue stuff and a cleaning tool and an occasional cassette clean with a spray on degreaser.

It’s wet in the photo because I’d just finished a wet 70km ride out to Brookfield. Got a bit exciting up some of the climbs like that!

I’ll try to get some better photos if/when this tyre does the same thing.

Mr Purple
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Re: Replacement for GP4000s?

Postby Mr Purple » Sun Mar 20, 2022 11:01 am

Did better with the current GP5000 rear. 1044.7km before bits started falling off it.

Image

That's the only canvas showing for now, but from experience it's going in the bin when I get home. Things tend to go downhill pretty sharply from here.

I'm putting on a new Pirelli P Zero Road and will track the mileage as well.

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foo on patrol
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Re: Replacement for GP4000s?

Postby foo on patrol » Sun Mar 20, 2022 11:23 am

Mr Purple wrote:
Sun Mar 20, 2022 11:01 am
Did better with the current GP5000 rear. 1044.7km before bits started falling off it.

Image

That's the only canvas showing for now, but from experience it's going in the bin when I get home. Things tend to go downhill pretty sharply from here.

I'm putting on a new Pirelli P Zero Road and will track the mileage as well.


I don't understand your lack of decent Klms out of tyres. :?

Foo
Last edited by foo on patrol on Sun Mar 20, 2022 5:11 pm, edited 1 time in total.
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warthog1
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Re: Replacement for GP4000s?

Postby warthog1 » Sun Mar 20, 2022 11:28 am

It sounds like standing and pushing hard on climbs which would unweight the rear tyre a bit. It is moving under power on the road I expect.
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Re: Replacement for GP4000s?

Postby Mr Purple » Sun Mar 20, 2022 11:35 am

warthog1 wrote:
Sun Mar 20, 2022 11:28 am
It sounds like standing and pushing hard on climbs which would unweight the rear tyre a bit. It is moving under power on the road I expect.
I agree.

I don't get great mileage at the best of times, but it is particularly bad with GP5000s for some reason. I don't mind wearing out the tread, but the bits chunking off seem to be shortening the lifespan even more.

Will report back on the next victim.

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Re: Replacement for GP4000s?

Postby vbplease » Sun Mar 27, 2022 7:18 pm

warthog1 wrote:
Sun Mar 20, 2022 11:28 am
It sounds like standing and pushing hard on climbs which would unweight the rear tyre a bit. It is moving under power on the road I expect.
You've now highlighted a benefit of having low watts/kg.. I'll get better wear out of my tyres :lol:

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Re: Replacement for GP4000s?

Postby warthog1 » Sun Mar 27, 2022 7:45 pm

vbplease wrote:
Sun Mar 27, 2022 7:18 pm

You've now highlighted a benefit of having low watts/kg.. I'll get better wear out of my tyres :lol:
Yeah I can't do that to them either :cry: :)
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Re: Replacement for GP4000s?

Postby Mr Purple » Mon Mar 28, 2022 12:01 pm

I'm always one prolonged 5W/kg+ effort from giving it all up and just cruising from one coffee shop to another on the flat bit. It would save on tyres!

170km on the new Pirelli P Zero 'Road'. A bit of grip issue over the top of Cootha on Saturday when it was wet - slipping and sliding even when seated climbing.

Hopefully that's just related to them being only 100km old at that point. Will report back.

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Re: Replacement for GP4000s?

Postby Mr Purple » Sat Apr 02, 2022 11:45 am

The Pirelli P Zero Roads are showing no measurable wear about 300km so doing better than the Contis already.

Grip is not great though, I think I'll move back to something stickier.

Thinking of ordering a few different tyres and comparing wear and grip.
- Veloflex Corsa Evo.
- Vittoria Corsa Open.
- Michelin Power Road.

Probably Schwalbe Pro One should be on there, but they're apparently hard to fit which is a dealbreaker.

Any other suggestions? One advantage of burning through a rear tyre every 1000km is that you get to try a few!

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Re: Replacement for GP4000s?

Postby warthog1 » Sat Apr 02, 2022 12:10 pm

If you are going through them that quick, whatever is reasonably priced and available.
I will likely be going back tubed also.
Not spending $100 plus for a bloody bicycle tyre that lasts me ~4000k on the rear.
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foo on patrol
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Re: Replacement for GP4000s?

Postby foo on patrol » Sat Apr 02, 2022 3:27 pm

I just don't understand why people buy race tyres for normal riding. :? Have you tried the lower priced tyres for a better life span, on another set of wheels, oh Purple one? :idea:

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Re: Replacement for GP4000s?

Postby 10speedsemiracer » Sat Apr 02, 2022 3:43 pm

Mr Purple wrote:
Sat Apr 02, 2022 11:45 am
The Pirelli P Zero Roads are showing no measurable wear about 300km so doing better than the Contis already.

Grip is not great though, I think I'll move back to something stickier.

Thinking of ordering a few different tyres and comparing wear and grip.
- Veloflex Corsa Evo.
- Vittoria Corsa Open.
- Michelin Power Road.

Probably Schwalbe Pro One should be on there, but they're apparently hard to fit which is a dealbreaker.

Any other suggestions? One advantage of burning through a rear tyre every 1000km is that you get to try a few!

The Schwalbe will likely last a shade longer than the Vittoria, but the Corsa is faster rolling than the Pro One (only by a bit).

Pro Ones are only difficult to fit on some rims however are a lovely tyre which roll very nicely ... but a long-term proposition they ain't. Same for the Corsa.

I would suggest a Rubino Pro Speed as a more durable option than the Corsa. Still a fairly quick tyre, but more durable.

Another thing I will note is that none of these tyres like being under a bigger rider, climbing or sprinting, on coarse chip bitumen. If that's you, as is me, then chewing out rear tyres is sorta par for the course..
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Re: Replacement for GP4000s?

Postby Mr Purple » Sat Apr 02, 2022 5:07 pm

foo on patrol wrote:
Sat Apr 02, 2022 3:27 pm
I just don't understand why people buy race tyres for normal riding. :? Have you tried the lower priced tyres for a better life span, on another set of wheels, oh Purple one? :idea:

Foo
A valid point but with much climbing comes much descending.

I don’t enjoy the rear tyre skipping around while descending the back of Cootha.

Thanks for the advice everyone!

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Re: Replacement for GP4000s?

Postby trailgumby » Sat Apr 02, 2022 6:37 pm

Mr Purple wrote:
Sat Apr 02, 2022 5:07 pm
foo on patrol wrote:
Sat Apr 02, 2022 3:27 pm
I just don't understand why people buy race tyres for normal riding. :? Have you tried the lower priced tyres for a better life span, on another set of wheels, oh Purple one? :idea:

Foo
A valid point but with much climbing comes much descending.

I don’t enjoy the rear tyre skipping around while descending the back of Cootha.

Thanks for the advice everyone!
For me, wet weather grip. The Conti 4000s and 5000s have been stellar.

I see that bicyclerollingresistance.com has a table comparing various aspects of performance, so maybe there are other cheaper tyres that perform as well in the wet, but I went to Conti's as a result of recommendations from this forum in the first instance, and feedback from other riders about well-known competing brands was they had low confidence in them when it wasn't dry.

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Re: Replacement for GP4000s?

Postby Mr Purple » Sat Apr 02, 2022 6:51 pm

Wet weather grip is the main determinant for me as well. The Continental GP5000s are excellent that, to the point you barely notice a difference in the rain.

The Pirellis not so much. And thinking back to the last time I was running them, I do recall sliding around under power on the River Loop, let alone going uphill. The P Zeros were literally occasionally spinning in place over the top of Cootha when wet - even when only seated and climbing.

If there was a tyre that gave me the wet weather and cornering ability of the Continental but lasted twice as long at the expense of weight and rolling resistance I'd buy them. I'm just not sure such a thing even exists.

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foo on patrol
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Re: Replacement for GP4000s?

Postby foo on patrol » Sat Apr 02, 2022 6:57 pm

Mr Purple wrote:
Sat Apr 02, 2022 5:07 pm
foo on patrol wrote:
Sat Apr 02, 2022 3:27 pm
I just don't understand why people buy race tyres for normal riding. :? Have you tried the lower priced tyres for a better life span, on another set of wheels, oh Purple one? :idea:

Foo
A valid point but with much climbing comes much descending.

I don’t enjoy the rear tyre skipping around while descending the back of Cootha.

Thanks for the advice everyone!

Oh, I fully understand that but I've also found the grip level of the Vittoria Rubino Pro's, too be very good and a 3rd of the cost of the Conti's. :mrgreen:

Foo
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Re: Replacement for GP4000s?

Postby Mr Purple » Sat Apr 23, 2022 12:18 pm

foo on patrol wrote:
Sat Apr 02, 2022 6:57 pm
Mr Purple wrote:
Sat Apr 02, 2022 5:07 pm
foo on patrol wrote:
Sat Apr 02, 2022 3:27 pm
I just don't understand why people buy race tyres for normal riding. :? Have you tried the lower priced tyres for a better life span, on another set of wheels, oh Purple one? :idea:

Foo
A valid point but with much climbing comes much descending.

I don’t enjoy the rear tyre skipping around while descending the back of Cootha.

Thanks for the advice everyone!

Oh, I fully understand that but I've also found the grip level of the Vittoria Rubino Pro's, too be very good and a 3rd of the cost of the Conti's. :mrgreen:

Foo
Where do you get them for that price?

They're $50-55 everywhere I can see, and you can generally get GP5000s for $67.

Gave up on the P Zero today after getting caught in the rain for 30km. Absolutely no grip in the wet - diabolically bad.

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Re: Replacement for GP4000s?

Postby warthog1 » Sat Apr 23, 2022 4:47 pm

Mr Purple wrote:
Sat Apr 23, 2022 12:18 pm
foo on patrol wrote:
Sat Apr 02, 2022 6:57 pm
Mr Purple wrote:
Sat Apr 02, 2022 5:07 pm


A valid point but with much climbing comes much descending.

I don’t enjoy the rear tyre skipping around while descending the back of Cootha.

Thanks for the advice everyone!

Oh, I fully understand that but I've also found the grip level of the Vittoria Rubino Pro's, too be very good and a 3rd of the cost of the Conti's. :mrgreen:

Foo
Where do you get them for that price?

They're $50-55 everywhere I can see, and you can generally get GP5000s for $67.

Gave up on the P Zero today after getting caught in the rain for 30km. Absolutely no grip in the wet - diabolically bad.

I think he is talking the now discontinued rubino pro 3 I believe.
They could be had cheap.
Not quite as fast and grippy as the contis and wore a bit faster (no good for you then) :lol: .
A good buy for the $20-30 they used to go for.
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Re: Replacement for GP4000s?

Postby Mr Purple » Sat Apr 23, 2022 5:30 pm

Put a Vittoria Corsa on today. That was not an easy job - very tight fit.

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Re: Replacement for GP4000s?

Postby Mr Purple » Sun Apr 24, 2022 10:24 am

Went out with a Vittoria Corsa on the front today with the old front GP5000 on the rear.

I always thought ‘supple’ was one of those weird pretentious cycling terms but now I know what it means! Feels amazing, and gripped well too.

GP5000 wet grip is about equivalent to Pirelli P Zero dry. Took two short 500W climb KOMs. In the pouring rain.

Looking forward to trying a Vittoria on the back.

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Re: Replacement for GP4000s?

Postby blizzard » Sun Apr 24, 2022 7:58 pm

Mr Purple wrote:
Sun Apr 24, 2022 10:24 am
Went out with a Vittoria Corsa on the front today with the old front GP5000 on the rear.

I always thought ‘supple’ was one of those weird pretentious cycling terms but now I know what it means! Feels amazing, and gripped well too.

GP5000 wet grip is about equivalent to Pirelli P Zero dry. Took two short 500W climb KOMs. In the pouring rain.

Looking forward to trying a Vittoria on the back.
Interesting, I have a set of Corsa TLR waiting for when my GP5000s wear out. I bought them to see if you can feel the suppleness compared to the Conti's. Also, curious if I find them noticeably slower.

Apparently, there are a new version of the Corsa coming soon too.

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Re: Replacement for GP4000s?

Postby Mr Purple » Mon Apr 25, 2022 7:03 am

There's reportedly something like a 3W difference in rolling resistance between the Corsa and GP5000 at 100PSI.

I'm not convinced rolling resistance is a big factor in fast you'll be travelling overall. The Pirellis were even worse for rolling resistance, but that hardly matters when they were literally spinning in place on any climb over about 5% in the wet.

The Vittoria Corsas feel so supple pretty much everything else feels like riding on wood. I think confidence in them would make me faster, but we'll see.

Still have to work how to get them on easily and how long a rear will actually last though.

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Re: Replacement for GP4000s?

Postby trailgumby » Mon Apr 25, 2022 3:29 pm

Mr Purple wrote:
Sat Apr 02, 2022 6:51 pm
If there was a tyre that gave me the wet weather and cornering ability of the Continental but lasted twice as long at the expense of weight and rolling resistance I'd buy them. I'm just not sure such a thing even exists.
'
I was surprised to find the Maxxis Re Fuse has similar numbers for wet weather grip as the Gp5000 on bicyclerollingresistance.com, 66 versus 67. 14 watts per wheel resistance penalty, though. I think this explains why I had a front-only washout the other week on a roundabout in the wet with a Spesh Roubaix on the front teamed with the Re Fuse on the rear.

The Maxxis High Road rates slightly better at 68 and only a 5W penalty.

Needless to say, that bike now has GP5000s on it. The Roubaix's will be on eBay momentarily.

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Re: Replacement for GP4000s?

Postby biker jk » Mon Apr 25, 2022 3:42 pm

Somewhat irritating is that the Pirelli P-Zero Velo looks like it's discontinued. I have a set in 28c on one bike and found them to be very good indeed, so far. I thought I'd mention this tyre given the thread title since the Velo has the rolling resistance and grip of the GP 4000 but better puncture resistance. Other reviews are excellent as well. I scored these at $59 a tyre as well. Not sure why Pirelli discontined the Velo, perhaps because it's not tubeless compatible and that's where the market is going (I have no interest in road tubeless).

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Re: Replacement for GP4000s?

Postby Retrobyte » Mon Apr 25, 2022 4:01 pm

biker jk wrote:
Mon Apr 25, 2022 3:42 pm
Somewhat irritating is that the Pirelli P-Zero Velo looks like it's discontinued.
The P-Zero range is now -

Race (lightest)
Road (better puncture protection)
4S (all weather)

Road and 4S weigh roughly the same (240g), about 30g per tyre more than the Race

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