资料来源：http://www.okbike.cn/bbs/viewthread.php?tid=15870&extra=page%3D1

fulcrum-redcarbon-1-small.jpg (97.52 KB)
2008-8-30 02:03

fulcrum-redcarbon-2.jpg (67.12 KB) 2008-8-30 02:03

Vicenza, 01 February 2008 – Fulcrum introduces RedCarbon, the new model with carbon fibre rims dedicated to XC/All Mountain biking and weighing only 1,450 g per pair.
RedCarbon is the result of three years of studies and tests during which Fulcrum's aim was to realize a pair of wheels that would be lighter than RedMetal Zero – the model used by Julien Absalon when he conquered the rainbow jersey at the 2007 World Championships – but with even greater performance.

Fulcrum worked on three levels to obtain this result:

peripheral weight reduction: the use of carbon fibre for the rim has led to a considerable reduction of the wheel’s peripheral weight. This translates into greater reactivity so that now the RedCarbons are 15 percent more reactive than the RedMetal Zeros.

reduction of the number of spokes: the pair now has 8 fewer spokes than the RedMetal Zero wheel, four fewer in the front and four fewer in the rear. This means an overall reduction of the weight and, above all, a rotation of the rotating mass, and has therefore further increased the reactivity of both wheels.

asymmetrical rims: in order to reduce the number of spokes and maintain the same torque transmission as the RedMetal Zero pair, Fulcrum has made asymmetrical rims with carbon fibre. This is because the asymmetry improves the dish, the rigidity and the solidity of the wheel. The rear rim is asymmetrical on the freewheel side to improve torque transmission, while the front wheel is asymmetrical on the disc side to improve wheel rigidity during the braking stage, thereby increasing the bike’s steerability.

The RedCarbon wheels will be used by Julien Absalon during 2008 and will debut officially at the first World Cup event at Houffalize in Belgium.


They will go on sale, on the other hand, starting from October 2008.

Fulcrum RedCarbon – Technical Data

Rim
Material: carbon fibre
Height: 24.5 mm
Inside width: 19 mm
Profile: asymmetrical: freewheel side on the rear wheel and on the disc brake side at the front. Rim without braking surfaces.
Finish: carbon fibre

Spokes
Material: aluminium
Profile: aero
Nipples: oversize in stainless steel
Spoking: 20 front and 20 rear. Crossed in threes in the rear wheel on the freewheel side and in the front wheel on the disc brake side; in twos on the other sides
Finish: anodized satinized black

Hubs
Body: Oversize in aluminium
Axles: aluminium with 20 mm diameter front and rear
Bearings: Adjustable high-precision bearings for the AFS version (Shimano Center Lock compatible), with cone/cap adjustable bearings for the 6-screw disc brake version
Freewheel: monolithic freewheel body with two sealed bearings

Compatibility
UST Tubeless
Disc: international standard and Axial Fixing System

Weight: 1,450 grams

看来准备开打~

Tufo XC LP

XC LP 1350g的重量，足足比Fulcrum RED Carbon輕上100g。

Tufo02-798-99_nEO_IMG.jpg (93.23 KB) 2008-9-2 14:46
重點是，1350g是包含了2條Tufo自家的輪胎！兩條胎共重450g。故此輪組實際重量僅有900g

Tufo-Open-798-99_nEO_IMG.jpg (83.18 KB) 2008-9-2 14:46
各家廠牌會陸續加入這場Mtb carbon fiber wheelset的世界大戰

Just through the doors and awaiting a full off-road test at this year’s Moab 24-hour race, 13-14 October, are these carbon rimmed, tubular-tyred wheels from Tufo, the XC LPs.

The 24 hole deep section carbon rims are laced via Sapim bladed spokes to DT Swiss centerlock disc hubs. The XC2 1.95in tyres have a low profile tread pattern that's designed for fast rolling on hard terrain. The pair weighs 1350grams (including tyres but without quick release skewers). On their own the XC2 tubular tyres weigh 450g.

The tubulars were incredibly easy to stick to the rims with the supplied tape. We'd even go as far as saying they're easier to mount than tubeless tyres especially with no messing around with gap-sealing latex fluid. The only thing to ensure is mounting the tyre straight on the rim.

Tufo supply tyre sealant should you puncture but interestingly they recommend only filling the tubular after puncturing. You also get a valve tool for removing the presta core. Justin Loretz, chief weight-weenie at our sister publication What Mountain Bike, will be giving them a thorough testing at 24 Hours of Moab, we'll give you the heads up on how they performed at a later date.

If you’re not familiar with tubulars, the tyre is a sealed tube, sewn shut, that’s glued to the rim; the design is still very common on the road. The advantages are lower weight, because of the lack of a tyre bead and hooked rim sidewalls, and less chance of a pinch puncture. The disadvantage is that you have to carry a complete spare tyre for racing rather than just a tube. Wolber made mountain bike tubulars back in the ’80s, but they soon faded from view.

Back then, the weight advantage of an aluminium-rimmed wheel wasn’t enough to make tubulars attractive. This time round, the weight-saving of the carbon rims means these wheels weigh the same with tyres as a very light pair of regular wheels without, hence their reappearance.

The rim is only compatible with tubular tyres so you're pretty much stuck, literally, with Tufo’s tyres (we expect the Dugast Rhino XLs that Thomas Frischknecht uses would also fit). These are all very much aimed at cross-country racers.