Got some GP4000's from the UK - cheap

"Walrus" wrote in message ...

Quoted message said:

If you're in the market...I just got delivery of a pair of Conti
GP4000's from 'Parker-International' (http://tinyurl.com/a94fb) for
$AUD114 including postage and taxes. This compares to $AUD178 at Cecil
Walker. They arrived 7 days after ordering.

Picked mine up for AUD$42 each (not inc postage) last week from probikekit
when they had their weekend 10% off everything sale.. the latest Bicycling
Australia quotes around $105 EACH in their """"review"""".. talk about a
rip!..

cheers,
GPL

Walrus said:

If you're in the market...I just got delivery of a pair of Conti GP4000's from Parker-International for $AUD114 including postage and taxes. This compares to $AUD178 at Cecil Walker. They arrived 7 days after ordering.

I must add that this order included 3 sets of tyres (my mate grabbed some Supersonic's and the Attack/Force set - both cheaper than the 4000's) so the postage for me was cheaper than if I'd just got one pair.

Yeah I luv my GP-4000's, picked mine up from probikekit for $47 each I think with $18 postage (which I split with a mate).

essendon93 said:

Yeah I luv my GP-4000's, picked mine up from probikekit for $47 each I think with $18 postage (which I split with a mate).

have you ridden Pro Race 2's..... how do they compare if so ?

"MikeyOz" wrote in message ...

Quoted message said:

essendon93 said:

Yeah I luv my GP-4000's, picked mine up from probikekit for $47 each I
think with $18 postage (which I split with a mate).

have you ridden Pro Race 2's..... how do they compare if so ?

I'll bite... As long as after 150kms they don't randomly blow out a side
wall, I'll say they are better than PR2s 😉

cheers,
GPL

MikeyOz said:

have you ridden Pro Race 2's..... how do they compare if so ?

No haven't riden with the Pro Race, my previous tyre was the Rubino Pro's, and up the climb to KG, I reckon theres a min 10sec gain over 12 mins.

Looks like everyone's kicked a goal!

essendon93 said:

No haven't riden with the Pro Race, my previous tyre was the Rubino Pro's, and up the climb to KG, I reckon theres a min 10sec gain over 12 mins.

so not only should there be a weight handicapping system but a same-bike/tyre combo

I suggest tricycles. streamers must be standardised at 6" minimum...

"MikeyOz" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

have you ridden Pro Race 2's..... how do they compare if so ?

--
MikeyOz

There was a thread in r.b.t (Tour 10/2005 23mm clincher test) about rolling
friction coefficients from a German magazine test that has details for the
ProRace2 and the older GP3000, here's some of the info:
-------------------
Antti Salonen:
Yes, the tyres were tested on what looks like a steel drum. The wheel
and inner tube were the same for all tyres and the pressure always 7.0
bar. The equipment was actually Continental's so the result probably
didn't come as a surprise to them.

Of course their (Continental's) tyres also had strong points like excellent
puncture
resistance and a combination of low weight and good mileage. They just
aren't very fast. I don't know if it's an exaggeration to say that they
are not suitable for competition.

The rolling friction coefficients in your post were a bit off, but here
are all coefficients from the mag, lowest first. All tyres were
foldable 23-mm clinchers.

<snipped repeated coeffs>

The test also included a calculation that on a flat 40 km time trial, a
rider with a 300 W power output would finish 2 minutes and 18 seconds
faster with the Deda Tre tyres than with Hutchinson Top Speed.
-------------------
Ron Ruff:
Crr= Prr/(W*V) = Prr/ (85kg*9.81m*30km/hr*.2778) = Prr*.0001233
Here is the speed and differentials for all of the tires:

Tire Crr Speed* Delta

Deda Tre Giro d'Italia 0.0038 23.08
Vittoria Open Corsa Evo CX 0.0039 23.05 0.03
Michelin Pro 2 Race 0.0042 22.96 0.12
Vittoria Diamante Pro Rain 0.0044 22.90 0.18
Michelin Megamium 2 0.0047 22.81 0.27
Pariba Revolution 0.0048 22.78 0.30
Michelin Carbon 0.0050 22.72 0.36
Panaracer Stradius Pro 0.0051 22.69 0.39
Schwalbe Stelvio Plus 0.0052 22.66 0.42
Schwalbe Stelvio Evolution Front 0.0056 22.54 0.54
Continental GP Force (rear) 0.0057 22.51 0.57
Hutchinson Fusion 0.0057 22.51 0.57
Schwalbe Stelvio Evolution Rear 0.0057 22.51 0.57
Continental Ultra GatorSkin 0.0058 22.48 0.60
Ritchey Pro Race Slick WCS 0.0058 22.48 0.60
Schwalbe Stelvio 0.0059 22.45 0.63
Specialized S-Works Mondo 0.0061 22.39 0.69
Continental GP 3000 0.0067 22.21 0.87
Hutchinson Top Speed 0.0069 22.15 0.93
Continental GP Attack (front) 0.0073 22.04 1.04

* = in MPH
185lb rider + bike
250W rider output
CdA = .32m^2 (racing crouch, normal road bike)
Transmission efficiency = 96%
-------------------

Some of those figure contradict the manufacturers own claimed stats...😕 . eg The Gatorskins are faster than GP Attack???

Interesting though.

"Walrus" wrote in message ...

Quoted message said:

Looks like everyone's kicked a goal!

Wonder if the Australian disty will take note... I'm happy to pay a few $
extra for things at my LBS, or at least somewhere in Australia.. but when
the price difference is that great, they can go stick it.. (given that the
product isn't Australian made anyways).

cheers,
GPL

Walrus said:

Some of those figure contradict the manufacturers own claimed stats...😕 . eg The Gatorskins are faster than GP Attack???

Interesting though.

Doesn't *anybody* buy tyres based on their colour?

(ducks)

ali... (yellow tyres)

Couple of comments on this test...

Fast is one thing...cornering stability is another. Also, pressure is a major player in rolling resistance (or lack of)...Deda Open Giro's = 145psi vs Conti GP3000's = 130psi.

Still and interesting comparison though.

alison_b said:

Doesn't *anybody* buy tyres based on their colour?

(ducks)

ali... (yellow tyres)

Tyres should be one colour and one colour only...black, black or black. Unless you ride a unicycle in the circus (which should also really be black).

GPLama said:

"Walrus" wrote in message ...

Quoted message said:

Looks like everyone's kicked a goal!

Wonder if the Australian disty will take note... I'm happy to pay a few $
extra for things at my LBS, or at least somewhere in Australia.. but when
the price difference is that great, they can go stick it.. (given that the
product isn't Australian made anyways).

cheers,
GPL

Yeah me too...always prefer to support local business, but when you're talking 30%-50% savings...it's a bit hard to swallow.

Walrus said:

Tyres should be one colour and one colour only...black, black or black. Unless you ride a unicycle in the circus (which should also really be black).

oh go on... live it up a bit! 😄

It's really only a yellow stripe anyway... all yellow would be just too much!

ali

alison_b said:

oh go on... live it up a bit! 😄

It's really only a yellow stripe anyway... all yellow would be just too much!

ali

I did consider red which would match my frame (red/white/black)...but I'm not fast enough :p

"Walrus" wrote in message ...

Quoted message said:

Yeah me too...always prefer to support local business, but when you're
talking 30%-50% savings...it's a bit hard to swallow.

I also bit the bullet and got a jersey from probikekit.. AUD$45 for a
Sacco(?) short sleeve size 2 (yay for my anorexia!)... beats paying $100+
locally for some kind of flashy looking top..

cheers,
GPL

"alison_b" wrote in message ...

Quoted message said:

Doesn't *anybody* buy tyres based on their colour?

I got dark blue GP4000s.. does that count?

cheers,
GPL

"Walrus" wrote in message ...

Quoted message said:

Couple of comments on this test...

Fast is one thing...cornering stability is another. Also, pressure is
a major player in rolling resistance (or lack of)...Deda Open Giro's =
145psi -vs- Conti GP3000's = 130psi.

IIRC Miche PR2's have a max of 116 psi... might explain why I had some
busting fun at 120 (although there _has_ to be more margin for error than 4
psi)..

cheers,
GPL