Product Description Light and versatile for track, training or competition: the set For recreational track cycling or training for the toughest races, the Ellipse is the first choice. It is based on 30 mm deep, welded aluminium rims with first-class aerodynamics and high stability. The hub flanges have large spacing to provide maximum stiffness. Solid industrial bearings and strong, straight aero spokes create a stable connection between rim and hub. At the back there are 2 threads to allow 2 different sprockets to be used on one wheel and to make gear changes faster, which makes training easier. The design for user-friendly clincher tyres also contributes to this. Specifications:Application:TrackWheel Size:28"Tyre Type:clincher tyreNumber of Spokes:20Brake Type:none*Tubeless System:none * s have no brake tracks and may therefore never be used on the road, only in track races. Technical Information - Rim:Dimensions (ETRTO):15-622Inner Width:15 mmOuter Width:19 mmDepth:30.5 mmValve Hole Diameter:SV/Presta (6.5 mm)Rim Material:aluminium (Maxtal)Technical Information - Front Hub:Over Locknut Dimension:9 x 100 mm threaded axleBearings:cartridge bearings (sealed)Body Material:AluminiumTechnical Information - Rear Hub:Over Locknut Dimension:10 x 120 mm threaded axleBearings:cartridge bearings (sealed)Body Material:AluminiumTechnical Information - Lacing:Front Lacing Pattern:radialRear Lacing Pattern:2-crossSpoke Type:straight / aeroSpoke Size:279 mm (front) / 296 mm (rear)Spoke Material:steelNipple Type:self-lockingNipple Material:brassApproved For:Weight Limit:120 kg total weight* (rider, gear & bike)Air Pressure (max.):8.7 bars (23 mm)Recommended Tyre Width:21 mm - 28 mm * recommended for increased durability Features:low air resistance - thanks to strong aero featuresoptimum power transmissionlight and versatilerear hub with two sprocket mounts (" flip-flop" )steel axlessealed, adjustable cartridge bearingsconventional rim drillingSUP rim jointrear chainline: 42 mmminimum sprocket width: 7.5 mmTechnology:Maxtal The aluminium alloy produced exclusively for Mavic is 30 % more resistant than 6106 aluminium. That's why Maxtal rims can be super light - and yet durable. SUP Soudé Usiné Process. The rim joint is welded and then machined to produce a smooth surface. A welded rim joint is more durable and facilitates the lacing and truing of a perfect wheel. QRM+ Qualité de Roulements Mavic +. Mavic's most sophisticated bearing technology: with double seal and extremely dimensionally stable, micro-fine adjustable - according to your needs: super-smooth for maximum rotation and minimum tightening in bad weather conditions. Models:28" Track front: Manufacturer Number:F3250110 28" Track rear: Freehub:screw-on cassetteSprocket Mount:threaded (35x24)Gearing:1xManufacturer Number:R5670110Contents:1 x (front or rear wheel)1 x rolls Mavic rim tape1 x bearing adjustment tool1 x sprocket lockring2 x axle nuts Weight: black | 28" | Screw-on freewheel | Threaded freewheel | 120 mm: 990 g black | 100 mm | 28" | 100 mm | 100 mm: 905 g Manufacturer: Mavic Group Germany GmbH Geigelsteinstraße 10 83080 Oberaudorf Germany info@mavic.com