The ROCKY KOM 25A rims are produced using an aerospace aluminum alloy 20% more resistant and more rigid than the best aluminum alloy used for rims.
This allows to obtain lighter rims, with superior mechanical characteristics.
Rims: ROCKY KOM 25A 29er, internal width 25mm
Hubs: Carbon-Ti X-HUB MTB SP 91g (112g RS-1) + 185g.
Spokes: Berd Polylight.
Nipples: DSN ergal.
Number of spokes: 28/28.
Maximum bike system weight: 105kg (rider, bike, clothing and backpack / bags)
Wheelset weight: 1.190g. (Berd Polylight spokes).
The sales kit includes:
- ROCKY KOM 25A / Carbon-Ti X-HUB SP aluminium MTB wheelset.
- 2 Berd Polylight spokes.
- 2 spare DSN nipples.
- Tubeless tape installed.
- Barbieri Carbonaria valves installed.
The ROCKY KOM 25A rims close the performance gap between a carbon and an aluminum, with a low weight that's competitive with most carbon rims with these dimensions.
Our aluminum alloy is produced and drawn in Germany and wisely worked in Italy, where the rim is created by a straight bar, then subjected to the Shot Peening process which reduces the surface tensions of the material due to the processing, improving fatigue resistance and durability, and finally anodized and laser etched.
Rim features:
ROCKY KOM 25A 29er
This rim is built for cross country.
The asymmetric design allows to remarkably reduce the spoke tension difference between the two sides of the wheel, with a big advantage of lateral stiffness and stability.
The special inner profile makes the rim easily tubeless convertible using specific valves and tape, not included in the sales kit.
Matt black anodized aluminium 6000 T6
Aeronautic Surface Treatment (AST) eliminates surface tensions of the material, increasing the resistance.
The asymmetric design allows to remarkably reduce the spoke tension difference between the two sides of the wheel, with a big advantage of lateral stiffness and stability.
Hookles design
Suggested tubeless tape width: 26/27mm
Max pressure: 3.0 Bar
Tubeless ready
Height: 18mm
Width: 28mm
Internal width: 25mm
Number of spokes: 28
Hub features:
CARBON-TI X-HUB Boost MTB SP (Straight Pull)
Made in ergal 7075
Internationl Standard 6 holes rotor fixing
Sealed bearings: 2 front, 4 rear
Ergal cassette body, with 4 pawls and 56 P.O.E. (Point Of Engagement)
Front hub axle type: Boost 15 x 110
Rear hub axle type: Boost 12 x 148
Spoke type: Straightpull
Colors: Black
Weight: 91g (112g RS-1, 89g Lefty 2.0) + 185g
Spoke features:
BERD POLYLIGHT SPOKES
Berd spokes are made from an advanced polymer called ultra high molecular weight polyethylene (UHMWPE) that has 12 times the strength-to-weight ratio of steel and floats on water. Berd spokes have an improved fatigue life compared to steel and are impervious to the elements.
Berd spokes use 14 gauge threads to connect to standard nipples the same way metal spokes do. Opposite the threads is a loop, which is pulled through the hub hole and secured with a rod. Berd spokes feature a 1.8mm diameter in the mid-span and are 2.5 grams per spoke.
Advantages of BERD PolyLight spokes:
- the weight of 2.5g allows to save almost 70/80 grams compared to the Alpina HyperLite spokes, that are the lightest steel spokes available on the market
- 12 times the strength-to-weight ratio of steel
- Berd spokes also damp vibrations much more effectively than steel spokes. This results in a more comfortable, smoother, ride. Berd spokes provide 200% better vibration damping than metal spokes.
The UCI, which regulates professional cycling, has specifically approved Berd spokes, so you can race Berd spokes from local crits to the Tour de France.
Made in USA
Every wheelset is supplied with 2 spare spokes/nipples
Nipples: DSN ergal
Not supplied with quick releases
Our wheels are built by hand in house by highly specialized personnel.
The Bikeonline staff uses the best professional tools on the market into each step of the wheelbuilding process. The P&K Lie truing stand is one example, it allows us to check perfect truing through precise decimal comparators (0.1 millimeters accuracy).
We build most of the tools we use, to fit the level of our builds, which require a high accuracy.
The use of different tensiometers as Park Tool, Pillar and DT Swiss allows us to reach the correct tensions of every spokes.
Each wheel is pre-stressed by hand to ensure that nothing has been settling during the early stages of use and that the spoke tension remains constant for a long time even under very high loads.
This product is to be considered produced on request / on order, due to the high customization needed. It is therefore not possible to use the right of withdrawal or the cancellation of an order already confirmed.
See "Terms and conditions of use". Advance payment is required on this product.
