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Pneu à Clous Schwalbe Winter - Winter - TwinSkin - K-Guard
|Prix :||EUR 37,90|
|Tous les prix incluent la TVA.|
- Schwalbe Reifen Winter hs396Ã'Â DrahtÃ'Â -Ã'Â Tyre, Size 28Ã'Â X 1/2Ã'Â Inch
- 28 x 1/2 Zoll
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Description du produit
Avec moitié moins de clous que le "Marathon Winter", le "Winter" procure néanmoins une excellente tenue sur la glace. Seul, son grand frère, Marathon Winter peut - dans des conditions de prise d'angle extrêmes - offrir des prestations supérieures.
• Gamme Active Line : une carcasse 50 tpi à un prix abordable
• Clous en acier avec coeur en carbure de tungstène
• Gomme Winter: mélange spécifique pour pneus cloutés
• Protection anti-crevaison K-Guard. Sous-couche de matériau caoutchouc naturel renforcée de fibre Kevlar. Niveau de protection anti-crevaison 3 (sur une échelle de 1 à 7 chez Schwalbe, 7 étant ma protection maximale).
• Flancs TwinSkin : une couche de caoutchouc additionnelle sur les flancs permet de limiter les risques de coupure ainsi que d'améliorer sensiblement l'aspect de la surface
• 16" x 1.2 : 72 clous
• 18" x 1.6 : 76 clous
• 26" x 1.75 : 100 clous
• 700 x 30C : 118 clous
• 700 x 35C : 120 clous
• 700 x 40C : 120 clous
• 700 x 38B : 116 clous
Conseils d'utilisation : pour une efficacité maximum sur la glace, réduisez votre pression. A l'inverse, augmentez-la sur route sèche pour optimiser le rendement et diminuer les bruits de roulement.
Commentaires client les plus utiles sur Amazon.com
I installed these tires six weeks ago, and have been riding mostly in snowy and icy conditions since then.
The tires have noticeably--but not overwhelmingly--higher drag on dry road than my general use tires (low-end road-touring tires) have. The opportunity cost of their relative efficiency is that, without a deep snow tread, they do not get traction (given my riding style, at least) on a steep hill with more than 1/2" of fresh snow. But I can ride on flat terrain in 1--2" of fresh snow, and am secure on ice at moderate speed. The tires do not have studs far up the side (as Schwalbe Marathon winter tires do), but I do not need to ride in rutted ice, and I would not lean far enough into a turn on flat ice that those side studs would encounter the road, so they would be useless for me.
These tires seem to be identical to the Schwalbe Marathon studded tires, except for lacking side studs. Those tires have over 20 Amazon reviews. One problem noted by several reviewers is that some of their studs have fallen out. So far, I have not lost any studs in my tires.
They have two rows of studs, one each side of center. I pumped them up to about 70psi and I thought that might be too much but it's a good balance of keeping rolling resistance low but still getting good traction. I have not noticed any studs missing yet and I've had a lot of my miles just on pavement.
One word of advice, these are TOUGH to put on your rims. They are heavy tires and the bead is tricky to get into place. I even thought at one point they were not the right size because they will almost seem too big at first but you just have to tuck the bead in well. Your fingers will be very tired at the end of it.
Overall a great tire and excellent for the price. These were the cheapest I could find and have performed very well. I use them on a single speed bike that I also purchased from amazon. One nice feature is the reflective strip all the way around, great if you have to do any riding in the dark.
I would definitely purchase these again and recommend them to anybody doing any riding in snow or ice.
A few things to know beforehand:
1) They can be pretty difficult to put on. Between the wire bead and perhaps the tire sizing itself, I was fighting to get them onto my wheels. I found it difficult to get them on without pinching the inner tube, and even when I thought I had it right I walked out the next morning to a flat tire. The second time around was easier--so I'm more than willing to chalk this up to a beginner's learning curve. However, make sure you have sturdy tire levers, perhaps a bit of soapy water, and check out a few YouTube videos to get a general strategy worked out before installing (and make sure you have easy access to some spare tubes).
2) They require a break-in period of 25 miles (or 40km) on dry pavement taking it easy on acceleration and braking. Pick them up and install before you need them!
My commute is about six miles on various surfaces, mainly chip seal roads (where the extra traction afforded by the studs can really come in handy) but also non-trivial stretches of recently paved asphalt and both concrete roads and sidewalks. You do notice the greater rolling resistance--especially on windy days. They are also fairly loud and can induce a rumbling feeling while riding during the break-in period, but it does settle down after that. Though, you still won't be sneaking up on many people.
I've found that they do seem to have a greater propensity for being sucked into road ruts, whether that's packed snow and ice or normal interfaces between an asphalt road and concrete gutter or control/expansion joints on concrete sidewalks. I also did manage to lose four studs on my back tire in an emergency braking situation well after the break-in period, though it doesn't seem to be any less effective on ice.
Despite the effort involved in getting them on the wheels and keeping those wheels spinning through the added rolling resistance, they are well worth it. It's easy being extra cautious while turning or going over glare ice in sunlit conditions, but they definitely have saved my bacon on at least one occasion when I encountered an unexpected patch of black ice at a stoplight while braking.
Of course you have to turn slow because it just has the central rows of studs.
Expect your commute to be 10-20% more because of increased rolling resistance.
Would buy them again.