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Fulcrum began by developing a specific rim profile, with an inner rim width of 22mm (ideal for tyres between 30 and 45mm), special self-locking long head nipples and project-specific spokes. As they discovered when they developed the E-MTB wheels, the motor increases the load on the freewheel, which has to support greater torsional loads for longer periods too.
This is where Fulcrum focused their attention. Seeing as the freewheel body is the contact point where the drive force is transferred from the cassette to the wheel body, it is subject to higher stresses due to the increased power and jerks caused by the activation of the motor. This led Fulcrum to use a tempered steel freewheel body, with specific internals, able to support a tensile strength greater than 30%.
| Product Name: | Fulcrum E-Racing 4 DB Wheelset - Clincher - Centerlock - FW: 12x100mm | RW: 12x142mm - Shimano/SRAM HG Freewheel |
| Manufacturer: | Fulcrum |
| Item Code: | FUL513461 |
| activity: | Bike |
| material: | Aluminium |
| usage bikesport: | Road Bike, E-Bike, Gravel, Allroad / Gravel Road |
| hubs: | Aluminium |
| spokes: | stainless steel |
| rims: | Aluminium, |
| shifting system: | 9-speed, 10-speed, 11-speed |
| wheel size: | 28" (29") (622mm) |
| ASTM: | Category 2 |
| axle standard: | 12x100 (FW), 12x142 (RW) |
| wheel/hub version: | FW + RW, Set > 1700g |
| freewheel body: | HG Shimano/SRAM |
| braking system: | Centerlock/AFS |
| tire type: | Wire Bead Tire, Folding Tire, Tubeless Ready |
| spoke hole number: | 24 |
| fitting tire dimensions: | 30-45mm |
| ETRTO: | 22-622 |
| rim width: | 27.1mm |
| inner profile width: | 22mm |
| rim profile height: | 40mm |
| weight limit: | 135kg |
| nipples: | Aluminium |
| freehub system: | Shimano/SRAM HG |
| Model year: | 2021 |
| Color: | Black |
| weight: | 1870g |
| spoke hole number: | 24 |
| Manufacturer page: | http://www.fulcrumwheels.com/ |
| Selection: Fulcrum E-Racing 4 DB Wheelset - Clincher - Centerlock - FW: 12x100mm | RW: 12x142mm - Shimano/SRAM HG Freewheel | ||
|---|---|---|
| Currently not in stock | Delivery time 3-4 weeks | Freewheel Shimano/SRAM HG |
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