Extralite QRC-2 2012



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Brand: Extralite
Category: All Other Bike Related Items

Description: The natural evolution of E-Bones QRC with remarkable improvements. | | -Axle diameter grew up from 22 to 27mm. | | -Overall structure is stiffer and stronger. | | -New bearing preload system. | | -Self extracting left crank. | | Size: 172.5mm. | | Q-factor: 138mm. | | Weight: 458*gr/set. | | Bcd: 110mm standard compact. | | Bearings: external 30-42mm low friction. | | Spindle: integrated 27mm axle. | | Graphics: laser etched / CNC. | | Finishing: black anodized. | | Option: Hybrid ceramic bearings. | | * Cranks weight with complete BB91-42 assembly. | | We still mantain best features of E-Bones QRC: Lowest Q-factor, SSP, oversized bearings, sculpture machining and extremely lightweight. | | QRC2 our new generation of road compact E-Bones bring SSP (stress split profile) concept to the extreme, they are stiffer lighter and slimmer! | | Both cank levers have been designed for an innovative hyper sophisticate 3D cnc process that allows higher freedom on multidimensional shaping. | | Bearing preloader allows an easy and perfect preload adjustment. | | Self extracting left crank: no special tools are required! | | Hyper accurate Finite Element structure analysis minimizes stress concentrations and improves fatigue resistance. | | Each crankset receives the same sculpturing, processing and care once limited only to prototype units. | | Bearings: E-Bones come ready equipped with special bearings 6806 2rs (30-42-7mm). Our special bearings feature oversized balls, low friction seals and lighter weight. | Hybrid Ceramic option is also available on demand (HybridUp W). | We warmly recommend to use the original bearing. | However bearing fittings on E-Bones can accept any standard 6806 2rs bearing.


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