Continental Grand Prix 4000 Sll tire question.
11-26-22, 09:29 PM
#1
Senior Member
Thread Starter
Join Date: Jun 2018
Location: NW Ohio
Posts: 1,142
Bikes: 1983 Univega Super Strada, 1986 Panasonic DX5000, 1984 Fuji Team 85 Univega Gran Turismo, 1984 Lotus Unique, 1987 Centurion Expert, 1987 Centurion Ironman Master,
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 677 Post(s)
Liked 459 Times
in
182 Posts
Continental Grand Prix 4000 Sll tire question.
There is 2 of these 700X28 for sale locally private owner new in box for $70 .. These seem to be discontinued but would they be
too old to buy and is that a decent price?
too old to buy and is that a decent price?
11-26-22, 09:46 PM
#2
aka: Dr. Cannondale
Join Date: Jul 2009
Posts: 7,725
Mentioned: 234 Post(s)
Tagged: 0 Thread(s)
Quoted: 2152 Post(s)
Liked 3,401 Times
in
1,203 Posts
If stored properly, that’s a reasonable price.
I’d pay that.
Have been running these on my Cannondale ST for quite some time and they are great tires.
I’d pay that.
Have been running these on my Cannondale ST for quite some time and they are great tires.
__________________
Hard at work in the Secret Underground Laboratory...
Hard at work in the Secret Underground Laboratory...
Likes For rccardr:
11-27-22, 01:10 PM
#3
Crawlin' up, flyin' down
Join Date: Jan 2006
Location: Democratic Peoples' Republic of Berkeley
Posts: 5,642
Bikes: 1967 Paramount; 1982-ish Ron Cooper; 1978 Eisentraut "A"; two mid-1960s Cinelli Speciale Corsas; and others in various stages of non-rideability.
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 1020 Post(s)
Liked 2,511 Times
in
1,049 Posts
I agree with Doc. They are good tires.
__________________
"I'm in shape -- round is a shape." Andy Rooney
"I'm in shape -- round is a shape." Andy Rooney
Likes For bikingshearer:
11-27-22, 01:55 PM
#4
Senior Member
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 14,742
Bikes: Yes
Mentioned: 525 Post(s)
Tagged: 0 Thread(s)
Quoted: 3230 Post(s)
Liked 3,865 Times
in
1,439 Posts
These are the tires I'm using on most of my bikes. I think it's only been a few years since they were discontinued. I would probably trust them.
On the other hand you can find the newer Grand Prix 5000 online for around $40 each, so I'd try to get the seller to lower the price a bit.
On the other hand you can find the newer Grand Prix 5000 online for around $40 each, so I'd try to get the seller to lower the price a bit.
__________________
My Bikes
My Bikes
Likes For Andy_K:
11-28-22, 09:15 PM
#5
Sunshine
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 16,605
Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo
Mentioned: 123 Post(s)
Tagged: 0 Thread(s)
Quoted: 10947 Post(s)
Liked 7,473 Times
in
4,181 Posts
It's been over 4 years since the 4k was replaced by the 5k.
But yeah if they are in good condition and not cracked, that isn't a bad deal. It's hardly a screaming deal for 4 year old 4k tires, but jot a bad deal either.
But yeah if they are in good condition and not cracked, that isn't a bad deal. It's hardly a screaming deal for 4 year old 4k tires, but jot a bad deal either.
11-29-22, 12:30 AM
#6
Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,181
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1562 Post(s)
Liked 1,287 Times
in
858 Posts
The 4000 tires are definitely a bit wider than newer 5000 tires, mainly to compensate for today's much wider rims.
The 28mm 4000's are quite plump.
The 28mm 4000's are quite plump.
11-29-22, 12:37 AM
#7
señor miembro
Join Date: Dec 2018
Location: Pac NW
Posts: 6,602
Bikes: '70s - '80s Campagnolo
Mentioned: 92 Post(s)
Tagged: 0 Thread(s)
Quoted: 3869 Post(s)
Liked 6,458 Times
in
3,193 Posts
11-29-22, 07:40 AM
#8
Senior Member
Join Date: Aug 2010
Location: Utah
Posts: 8,653
Bikes: Paletti,Pinarello Monviso,Duell Vienna,Giordana XL Super,Lemond Maillot Juane.& custom,PDG Paramount,Fuji Opus III,Davidson Impulse,Pashley Guv'nor,Evans,Fishlips,Y-Foil,Softride, Tetra Pro, CAAD8 Optimo,
Mentioned: 156 Post(s)
Tagged: 0 Thread(s)
Quoted: 2323 Post(s)
Liked 4,936 Times
in
1,763 Posts
Yep, I'm running a few set of the new 5000s tires now and they are all running undersize for me.
__________________
Steel is real...and comfy.
Steel is real...and comfy.
11-29-22, 08:13 AM
#9
Senior Member
Join Date: Jun 2012
Location: Stillwater, OK
Posts: 7,827
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 1872 Post(s)
Liked 692 Times
in
468 Posts
That's a smoking deal. Let me know if you pass, I'll take them.
The 4000s are 1) wider than the 5000s and 2) considerably beefier in terms of amount of rubber and sidewall material. I have found the 5000s very flat prone, the 4000s...not nearly so. The 28mm size for the 4000s is fairly rare too.
The 4000s are 1) wider than the 5000s and 2) considerably beefier in terms of amount of rubber and sidewall material. I have found the 5000s very flat prone, the 4000s...not nearly so. The 28mm size for the 4000s is fairly rare too.
__________________
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
11-29-22, 08:36 AM
#10
Senior Member
Might want to put eyes on the tires and check the date code on them.
https://www.continental-tires.com/bi...e-construction
If they're more than 6 or 7 years old, you might want to consider passing. Unless stored in an inert atmosphere or sealed container, rubber degrades over time due to slow oxidation. Ozone and exposure to certain chemical fumes can dramatically accelerate the degradation.
Depending on which source you want to accept, 6 or 10 years is the max recommended lifetime of auto tires. And auto tires have a helluva lot thicker rubber than road bike tires - and a lot more area over which to spread the load.
https://www.continental-tires.com/bi...e-construction
If they're more than 6 or 7 years old, you might want to consider passing. Unless stored in an inert atmosphere or sealed container, rubber degrades over time due to slow oxidation. Ozone and exposure to certain chemical fumes can dramatically accelerate the degradation.
Depending on which source you want to accept, 6 or 10 years is the max recommended lifetime of auto tires. And auto tires have a helluva lot thicker rubber than road bike tires - and a lot more area over which to spread the load.
11-29-22, 10:52 AM
#11
Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,181
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1562 Post(s)
Liked 1,287 Times
in
858 Posts
Tires grow a bit with age, mostly within the first couple of days and rides and a bit more over a year's riding.
Tire pressure affects measured width as well.
13mm rims should be considered extra-skinny, modern road rims are about 18mm internal. Each 1mm of rim width affects tire width by almost .5mm.
My 5000's in the 25mm size are only 1mm narrower than 4000's on the same rim (once both tires have had some time and miles to settle on their dimensions).
By most reports, the 5000 is about the same as the 4000 in terms of mileage and puncture resistance. Their measured thickness at center is also nearly identical with both tires nearly 3mm and both using their super-thin and strong Vectran belt.
The 5000 is a couple watts faster (per tire) at equivalent pressure. I doubt that it's 1mm narrower width is causing that since they were tested at the same pressure.
11-29-22, 03:17 PM
#12
Senior Member
Thread Starter
Join Date: Jun 2018
Location: NW Ohio
Posts: 1,142
Bikes: 1983 Univega Super Strada, 1986 Panasonic DX5000, 1984 Fuji Team 85 Univega Gran Turismo, 1984 Lotus Unique, 1987 Centurion Expert, 1987 Centurion Ironman Master,
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 677 Post(s)
Liked 459 Times
in
182 Posts
I ended up getting the tires for $60.I'm not positive but I think they will fit on my 1989 Ironman.
11-30-22, 08:22 AM
#14
Senior Member
Join Date: Jun 2012
Location: Stillwater, OK
Posts: 7,827
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 1872 Post(s)
Liked 692 Times
in
468 Posts
Good score. Depends on which rims you have, if they're narrow you'll be fine, but if they're wide don't be surprised if those tires balloon out to almost 31-32mm.
__________________
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
12-03-22, 07:47 PM
#15
Senior Member
Join Date: Sep 2014
Location: Baton Rouge La
Posts: 1,214
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 394 Post(s)
Liked 346 Times
in
230 Posts
I have the 25mm 4000s II on Mavic Open Pro rims on an '86 Ironman and they measure just under 26mm with about 90 - 95 psi.
I also have an '87 Ironman Expert with the unicrown fork with 27mm Vittoria Open Pave's that measure a bit over 26mm on the stock Wolber Alpine rims. There's not a lot of clearance at the closest points which seems to be under the rear brake and at the chainstays, and under front brake and at the fork blades - maybe about 4mm - 5mm. It's a comfortable amount of clearance but not huge.
I also have an '87 Ironman Expert with the unicrown fork with 27mm Vittoria Open Pave's that measure a bit over 26mm on the stock Wolber Alpine rims. There's not a lot of clearance at the closest points which seems to be under the rear brake and at the chainstays, and under front brake and at the fork blades - maybe about 4mm - 5mm. It's a comfortable amount of clearance but not huge.
