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"Smooooth. The drums .... spin with such fluidity that, to paraphrase a bike-review cliché, they disappear beneath you. At 90 rpm in medium gearing, the drums let you whirl at talking pace but are small enough to make you suffer at high rotations.... we found the ride exceptionally smooth at all speeds but especially so at heavy loads with high cadence..." "OUR VERDICT: Exquisite ride and great looks" (Bicycling, January/February 2004)
Ted King might agree ... |

Product Improvements
NEW PRODUCT OPTION ADDED IN 2012! 
We are excited to announce the addition of the PROGRESSIVE RESISTANCE option. We are using patent-pending technology that employs dynamically mounted high power magnets to deliver reliable, consistent progressive resistance inside the roller drum. See how it works on YouTube by clicking HERE
2012 improvements
This year we redesigned the end cap mold to index all the important features together so that every shot delivers a perfect part. This significantly reduces runout variations before lathing to improve dynamic balance.
2011 improvements
We’ve added a zinc dichromate plating on the frames before they are powder coated to provide a longer life, especially if the frames are scratched by cleats
2009 improvements
We made the leap to laser-cut inner axle tubes for optimum bearing alignment, which significantly improves drum life. We also modified the end cap mold to improve tolerances on the cap and drum assembly.
ZRO Aluminum - Models: CLICK HERE FOR PDF BROCHURE
- ZRO100 - uses three non-resistance drums MSRP $299
- ZRO110 - includes one progressive resistance drum MSRP $399
- RD 110 - replacement progressive resistance drum compatible with all SportCrafters and bi-fold CycleOps rollers MSRP $149
Drum Diameter: 3.25”- Drum Wall Thickness: 0.125”
- Typical runout: less than 0.001" - imperceptible
- Balance: Computer spin balanced
- Fits Bike Wheelbase: 38" - 44.25" (965 - 1124mm)
- Width: 16”
- Frame: Bi-fold tubular steel 1” square 16 guage, zinc plated and powder coated
- Bearings: Precision, low friction hi-temp grease packed and sealed
- End Caps: Molded Polycarbonate

ZRO PVC
- Drum Diameter: 3.50”
- Drum Wall Thickness: 0.250”
- Typical runout:
- Balance: Close tolerance components provide smooth ride at average road speeds
- Fits Bike Wheelbase: 38" - 44.25" (965 - 1124mm)
- Width: 16”
- Frame: Bi-fold tubular steel 1” square 16 guage, zinc plated and powder coated
- Bearings: Precision, low friction hi-temp grease packed and sealed
- End Caps: Molded ABS
- MSRP: $199
- NOW ON SALE AT SPINZONECYCLING.COM FOR $129.00 ! HURRY!!




