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Reliving the old days (700 x 25s)(30 posts)

Reliving the old days (700 x 25s)mickey-mac
Nov 6, 2003 9:24 PM
Last week I put 700x25 tires on my bike for the first time since the 1980s, figuring I'd leave them on for winter. They're the same tires (Axial Carbons) that I'd been running at 700x23 for the past two years or so. Maybe I'm just getting old, or maybe it's my imagination, but they feel so damn nice, especially on rough roads. A descent on my regular ride has a long and uneven utility cut running the length of the road. The new tires really soak up the bumps on the offset sections and make the descent feel much more secure. I don't really feel any difference in performance or rolling resistance on smooth roads. Maybe I won't switch back to 23s in spring. Is anyone out there riding 700x25s full-time?
Alternative plansn69
Nov 6, 2003 9:31 PM
Swith over to synthetic casing 19mm tyres (olde skoole spelling, dontcha know) for a bit, and then go back to cotton casing 23s. It's astounding, leaving one with the no-kidding sensation of a suspension-tuned ride.

I played around with that a bit on an old 6XXX-series aluminum-pipe 'Dale, and the ride difference was astounding.
Alternative planmickey-mac
Nov 6, 2003 9:42 PM
Oh yeah, I remember the good old days when we used to laugh at anyone riding anything bigger than a 20. Fortunately, people pass me so fast these days they don't get a good look at my tire size.
I like mine on the fixed gearTig
Nov 6, 2003 9:51 PM
I might even use some 25's on the Merckx. They ride like a Lexus. Since it is almost impossible to bunny hop over a hole with a fixed gear, having the extra cushion is helpful. I also like having the extra width during winter months when the concrete isn't as warm and is sometimes wet from rain. 25's sure corner with confidence.
Nov 6, 2003 9:54 PM
Put 'em on for an event that included some unpaved hardpack two years ago, and bought two pairs since. Right now I'm back on 23s (sale price!!!) but will probably return to 25s. If you keep the pressure up, I never felt any slop or drag. I'm a long distance "tourist". Pace is important, I s'pose, but I'm not racing. I want a comfortable 75-85-100 whatever under my belt more than anything.
I've always ridden 700 x 25sgtx
Nov 6, 2003 10:01 PM
Used to train on 700 x 25 Specialized Touring IIs (remember those?) and race on Vittoria Corsa CXs. Then somewhere or another I discovered Contis (probably 1990 or so). Right now I use the Ultra 2000s. I've never seen any reason to ride anything but 700 x 25 unless you're in an actual race. They last longer, protect your wheels better, get fewer flats and are more confy. What's not to like? I think when I hit the lottery and have tons of free time I'll go back to tubulars, at least for fair weather riding.
re: Reliving the old days (700 x 25s) YES - better ridecollectorvelo
Nov 7, 2003 12:42 AM
I have put 700x25 on all my bikes with wire-ons - they ride better I feel. And of course, most sewups in the time of lots of upper end bikes coming withy sewups were are 25c.
25s on the training wheelset...biknben
Nov 7, 2003 5:09 AM
23s on the racing wheelset. I do notice a difference.

FWIW, the 25s are Conti GP3k 4-Season tires.
Conti GP 4 Season are great tires (nm)PEDDLEFOOT
Nov 7, 2003 5:47 AM
I train on fat cheap tires. all the time.MR_GRUMPY
Nov 7, 2003 6:10 AM
For training purposes, I always ride 700X25's in back. My favorite setup is a Conti Sport 1000 700X25 in back and a Conti Ultra 2000 700X23 in front. Both are wire bead, so they are dirt cheap. When you throw on a set of racing wheels, you really move.
Hard to find this size in...Fez
Nov 7, 2003 7:56 AM
Michelin Pro Race and Conti GP3000, two of the most mass produced high end road tires. I think they make the 25 size, but it is almost always stocked in the 23 size.

I see the 25 size in different Michelin and Conti tire model, just not the Pro Race or GP3000.
Found 'emPmbH
Nov 7, 2003 9:08 AM
I get my PG3000's in 25's from Speedgoat, although sometimes I have to wait a while. I've never ridden anything smaller than a 25 ever.
Pro Race 25s at
Nov 7, 2003 9:09 AM
Pro Race 25s at
Nov 7, 2003 11:47 AM
recently got a set from them, was on 23C Pro Race before...BIG improvement in the ride, I won't be going back to the 23's....FWIW the 25's only available in grey however
25Cs live!Fredrico
Nov 7, 2003 7:57 AM
Many Bike shops don't even stock them, claiming there's no difference between 25C and 23C, which posters here have just proven wrong. Wire beads, too. They're easier to mount, just as fast as skinnier widths, only a few grams heavier, roll over the bumps and corner easier, don't pinch-flat, and never blow off the rims. What more could you ask for?

Every time I've gone narrower, always returned to 25C. Run 28Cs on my commuter bike, for the same reasons. The weight penalty is only noticeable on climbs, in a pack.
I doubt you noticed the weight penalty. If anything...Fez
Nov 7, 2003 10:12 AM
I doubt you noticed the weight penalty (30 grams if you are comparing different sizes of the same tire model) on any climb. Do you suppose you were comparing a 220 gram 700x23 versus a 350 gram 700x25?

If not, the only other explanation could be the 700x25c has a larger rolling diameter than the 700x23c, effectively putting you in a taller gear, hence the slower climb.
25c lives on my bike , too.dzrider
Nov 7, 2003 8:10 AM
I'm using up the last of the 23's and never going back. I use even bigger tires for commuting much of the time.
Axial Pro Race 25sKEN2
Nov 7, 2003 8:34 AM
I use Axial Pro Race 25s on my road bike all the time, mounted on a Mavic Cosmos wheelset. They are noticeably smoother and more confidence-inspiring on fast descents, and I detect no extra rolling resistance. They are only a few grams heavier than the 23s. They are hard to find--I ordered mine mailorder, can't remember from where. Oh, and I run them at 90 front/95 rear (max pressure is marked as 95) and I weigh 190.
700X25 for my fast bike. 700X30 and 27X1 1/4 for othersContinental
Nov 7, 2003 8:54 AM
I can ride farther because I'm more comfortable and I don't care in I'm 0.1 mph slower. I also inflate to 90 psig.
How about 28mm Vittoria all-weather pave tubulars? Cushy! nmSpunout
Nov 7, 2003 9:44 AM
Winter is comingfracisco
Nov 7, 2003 9:46 AM
I'm thinking that some 700 x 25's with Mr. Tuffy liners will be good for the next 4 - 5 months of riding. I learned that Mr. Tuffy's are good last winter.
Currently using 25c on my bikeChicago_Steve
Nov 7, 2003 9:56 AM
Serfas (better known for saddles and other goods) makes a nice 700 x 25c tire called the < a href=>Seca. They are relatively light for a wire bead tire and have a flat protection liner built in. They are pretty comparable to Conti GatorSkins (maybe better in the wear department) but can usually be found fairly cheap. My last purchase off of eBay was for $12/tire...
One better 700 x 26LC
Nov 7, 2003 10:41 AM
They are made by Specialized and are the biggest I can fit on the rain bike with fenders. I don't think you can find them anymore?
Oh yeahvindicator
Nov 7, 2003 10:59 AM
I run 25s full time, including some races. I have recently acquired a second set of wheels, though, so next year my "race wheels" will have skinnier tires, but if I need a wheel change, my spare will still be the 25s. Other than future races, though, it's all 25s, all the time.

Haven't used anything smaller than 28 in yearsSilverback
Nov 7, 2003 10:59 AM
I ride most of the time on 32s, occasionally go down to 28s for a smooth-road century. Even if I were still racing, I don't think I'd ever go back to skinny tires. The disadvantages just outweigh the benefits, for me.
re: Reliving the old days (700 x 25s) -- great size -jbean
Nov 7, 2003 12:50 PM
I like 25c tires best; but on some bikes I use 28c
for me- 23c is just not enough rubber between my rim and whatever i might hit
re: Reliving the old days (700 x 25s)Barton
Nov 7, 2003 1:05 PM
I use Michelin Axial Pro's 700X25 on my Jamis Eclipse.

Works for me.
re: The Dark and Cold days (700 x 28s)jrm
Nov 7, 2003 2:15 PM
I tend to switch to 28c Panaracer Tserv's 28c's in the winter and use 23c's in the warm months. There the most durable tire ive found so far and hold 120psi real well.
Yup - Vredestein Fortezza 25'sMike Prince
Nov 8, 2003 6:25 AM
I won't be going back either. Thinking of putting on some 28's this winter if the Vreds wear out. Also I only put in 100psi and they ride great.

There is a huge difference in ride and to me no speed penalty. Big tires rule!
Wider tires = lower rolling resistancetube_ee
Nov 8, 2003 9:40 PM
Yes, you read that correctly. All other factors being equal, wider tires have less rolling resistance than skinny ones. This was shown empirically by Jobst Brandt over 20 years ago, and can be shown theoretically quite easily as well. I have no idea why the myth of "narrower = faster" persists after 20 years, but then, the "stiff frames are more efficient" myth can't seem to be killed off either.

I try to sell everyone on 25s (since 28s don't fit in most frames) at the shop I work at. It seems like very few people are happy with 23s, but are terrified of what they percieve to be higher RR in the 25. Everyone I've managed to convince to try them has come back raving about the comfort and the ride. No one has returned their tires. No one.

--Shannon "fatties rule" Menkveld