2010年12月9日星期四

Its Gates Carbon replica Chanel H0968 J12 Quartz Men watches Belt Drive is set up

It weighs about 25 pounds and is a single-speed model with a front shock.At $1,799, Norco sells the Judan in one configuration only. Its Gates Carbon replica Chanel H0968 J12 Quartz Men watches Belt Drive is set up with a46-tooth front sprocket and 28-tooth rear cog, which is about the equivalent to a 32-tooth by 20-tooth traditional chain drive.It pedaled strong and--strangely--almost silently as I rolled onto a singletrack trail near my home. The belt drive cranked smoothly, and except for braking and wheels biting the dirt, there was almost nonoise. Norco made the Judan for steep mountain biking areas. Its sprockets spin easily on rolling trails and going up hills. But on flats, and especially going downhill, the ratio limits your speed.

Because the Judan is a single-speed bike, you cannot shift up or down to match the terrain. Single speed is how many belt-drive bikes are configured. To get replica Chanel J12 Diamonds Black Cerami watches gears with a belt drive, you need an internally-geared hub, which is becoming more common from companies like Rohloff and Shimano.Overall, the belt drive functioned little differently from a chain. It provides all the power of metal links, though with a few advantages. Mud clogging the chain is less of an issue with a belt drive.

Gates touts its polyurethane belt as unlikely to stretch or break. Not having to lube a chain is a nice feature, too.On ultra-light bikes, the Gates system is appealing, as it can shave ounces off total bike weight. A complete Gates belt-drive-and-sprockets system weighs a mere 240 grams.For bike commuters, the belt drives might make even more replica Chanel J12 Chronograph Unisex watches sense. Ever arrived at school or work with a grease stain on the inside of your pants cuff? This wont happen with a grease-free belt drive.Cost is significant, however. A Gates belt drive can add a couple hundred dollars to a bikes retail price.But from world champion riders to workaday commuters, belt drives are catching on. Watch this year for more people pedaling carbon-embedded belts--and leaving the bike chain behind.--Stephen Regenold is founder and editor of .

没有评论:

发表评论