Boltwheels standard rims (H:27mm, W:19,5mm)
-Total weight without QR and rim tape: 1460g. Front : 646g / Rear : 814g(*)
(*) 800g with Campagnolo body
-Max rider weight : 95kg.
-Recommended tire width: 23mm, 25mm
-Total weight without QR and rim tape: 1515g. Front : 672g / Rear : 843g(*)
(*) 835g with Campagnolo body
-Max rider weight : 110kg.
-Recommended tire width: 23mm, 25mm, 28mm
All parts are easily available, and require no special tools for servicing.
Thought-out spoke pattern for stability stiffness and durability.
-Front : 20 spokes radial
-Rear(left) : 8 spokes radial
(right) : 16 spokes 2 cross
Race-lace option for maximum lateral rigidity (+10g). Due to thicker spokes and different lacing slightly less aerodynamic.
Matching components to make a whole that is more than the sum of the
Tubeless possible: check here for instructions. Mail for further questions.
Top quality easy maintenance lightweight hubs with quality sealed cartridge bearings.
High flange and 30 point engagement for direct power transmission.
Ceramic upgrade possible.
Material 6061 alloy, axle 7075 alloy
Front : 10mm axle, weight: 78g
Rear : 15mm axle, weight: 236g
Special niobium aluminium alloy.
Light, though, durable.
-19,5mm wide, 14mm intern
-23mm wide, 17mm intern
Spokes and nipples
Sapim laser spokes with thin middle section. Light , strong, aerodynamic and flexible, for a smoother ride.
Possible upgrade to Sapim CX-ray for even better aerodynamics.
Front : 278mm
Rear (left) : 272mm
(right) : 274mm
Front : 277mm
Rear (left) : 271mm. Sapim D-light
(right) : 273mm. Sapim D-light
Sapim polyax aluminium nipples, reducing rotation mass.
Hollow axle, 92g pair.
High pressure rim tape, 36g pair
Let's take the imaginary situation of a cyclist traveling at
40 km/h on a flat smooth road with no wind. Now lets look at the resistance the cyclist has to overcome.
85% is air resistance, 15% is mechanical resistance.
- 65pp the cyclist
- 20pp the total bike: 5pp the wheels (low profile box section
rim, 36 round spokes)
- 12pp rolling resistance :
- 11,7pp tire on the road (good tires are equally important!)
- 0,3pp wheel bearings
- 3pp other mechanical resistance: chain, sprockets, bottom
TO SUM IT UP
About 5,3% of total resistance is produced by the wheels, most of it is air resistance. This can be reduced to a minimum of 2,5% by using disc wheels, but this is far from ideal in most conditions. Also, by using fewer and thinner spokes and aerodynamic rims, we can reduce this resistance.
Bolt Wheels are designed to minimize aerodynamic drag and still perform well in all conditions.
-Fast acceleration. During acceleration rotation mass is doubled!
-Better climbing, better handling, more responsive.