A-System by Alpina is an innovative Tubeless Spoked Wheel.
This revolutionary system consists of hermetically sealing the holes within the rim.
Moreover the use of a terminal with gasket, guarantees the complete absence of air strain during the normal use of the wheel .The rim is traditionally hole punched, but in the case of A-System by Alpina the holes are oriented in a particular direction and are also threaded. A terminal with gasket is inserted into the threaded hole.The spoke is held by the terminal through a toggle joint and the ABS (Alpina Block System) nipple is based in the hub.
The Alpina wheel, thanks to its close-knit spokes connects the hub and the rim, and allows an optimum load distribution.
Should a spoke break the wheel will still continues to work. The flexibility of the tubeless A-System in contrast to integral wheels means any kind of impact can be absorbed.
This means A-System wheels are particularly suitable for cross country and road riding races. They also improve tyre performance. Alpina is now launching an innovation in the SUPERMOTO world, a generation of extreme wheels created with a futuristic design.
These new wheels have enhanced the performance, the safety and the use itself of the bike.
The wheels are supplied with hubs made of high resistant Aluminium Alloy and made of a solid piece (CNC).
- BY IMPROVING THE PUNCTURE RESISTANCE
- BY INCREASING THE MANAGEABILITY OF THE BIKE
- BY LOWERING THE WEIGHT OF THE ROTATING BULK
- BY COPING WITH HEAVY IMPACT STRESS
- BY REMOVING THE DISADVANTAGES OF GREATER RIGIDITY
- TUBELESS WHEELS GIVE WAY TO A SMOOTHER
RIDE AND ENHANCED TYRE PERFORMANCE
Self blocking
means a kind of nipple that also without a pre-load generated by the interference between the threaded spoke border and the nylon ring inserted in the nipple itself, has an unscrewable braking couple.
The wheel is moving. This movement creates some loss in the spoke tension and this phenomenon destabilises the spoke/nipple connection (if the nipples is un-loaded it can be unscrewed).Since years the ABS system is successfully used in the bicycle sector.
SAFETY
Increases puncture resistance
Tyre explosion is minimized
Overheating damage, due to friction between inner tube and cover tyre, is eliminated
Better manageability
Spoked wheels are indestructible and able to cope with heavy impact stress without bending
Cover rotation on the rim creates no danger of valve being ripped out
SMOOTHNESS OF THE RIDE
No dispersion of energy caused by inner tube cover tyre friction
WEIGHT/RIDER HANDINESS
The absence of the tubes, allows a loss of weight of about 1,5 Kg for each wheel set
The rotating bulk is reduced due to the elimination of peripheral wheel bulk. This optimizes the acceleration and both the rider handiness and the brake system
USE
The tyre potential power is highlighted by the absence of rigidity in the tube, and the heat locally generated by the friction between the tube and the cover tyre
Low pressure, very much appreciated in cross-country races optimizes the grip, therefore
improving the managability of the cover tyre positioned between the rim and the outer tyre
The shape then adjusts according to the road conditions, without added precautions
The tyre is completely sealed, allowing no water or dirt to get in
MAINTENANCE
The wheel doesn’t require any particular maintenance, except the usual balance wheel register and tyre substitution.
There are no longer any easily damageable parts
The mounting and removal of the tyres, is safer and more practical
The tyre wear is hugely reduced.
The color of the rims is expected to double in two versions: - ONE COLOR – BICOLOR
ALUMINUM COLORS AND COMBINATIONS
CARBON MATRIX PRO ALUMINUM COLORS AND COMBINATIONS
The innovative Alpina Tubeless A-System spoked wheels are available also for Naked Motorcycles.
STS SYSTEM
Complete spoked wheels assembled with
STST tubeless kit and ALPINA hub
RIMS ALPINA
- 36 Alpina Ecozinc rims
NIPPLES ALPINA
- 36 Nipples Alpina STS
- Retaining rings
HUB ALPINA
- Produced in high resistant Aluminium Alloy from a solid piece
RIM ALLOY OR CARBON
- Front rim: 17”x3,50” Rear rim: 17”x5,50”
The rims will be supplied with SAND BLASTED finishing and ANODIZED
Design: Single-color/Two-tone
ADAPTABILITY
- GT 1000 / PAUL SMART/ SPORT CLASSIC
DUCATI MONSTER 2010
STSTEMA A-SYSTEM
The innovative Alpina Tubeless A-System spoked wheels are 
available also for Naked Motorcycles.
SPOKES ALPINA
- Stainless steel double-butted spokes for Tubeless application use – AISI 304
- Produced with Tubeless technology (Patented)
- Rear Spokes : 36 spokes, Ø mm. 4.0
- Front Spokes: 36 spokes, Ø mm. 4.0
NIPPLES ALPINA
- ABS (Alpina Block System – Patented)
- Produced with zinc-chrome plated steel
HUBS ALPINA
Produced in high resistant Aluminium Alloy from a solid piece
The hubs are predisposed for nipples attachments and sand blasted finishing, anodized.
Realized with a radial assembly
CERCHI ALLUMINIO O CARBONIO
Front rim: 17”x3,50”
Rear rim:17”x4,50” / 17”x5,50”
The rims will be supplied with SAND BLASTED finishing and ANODIZED
Design: Single-color/Two-tone
ADAPTABILITY:
- DUCATI MONSTER (no single swingarm – fino al 2009) / HONDA HORNET / BUELL / GUZZI V11
Completely interchangeable with the original wheel and compatible with the series motorcycle without need to change any original component assembled in series – gears, braking disks and original screws.
TECHNICAL CHARACTERISTICS
- Double butted spoke(reduction of diameter by hammering from 5.0 to 3.9)
- High resistance carbon steel
- Cold forged with zinc-nickel surface treatment
- Special reinforced and lighter rim
- TUV homologated wheel
Completely interchangeable with the original wheel and compatible with the series motorcycle without need to change any original component assembled in series – gears, braking disks and original screws.
Adaptability
MOTOCROSS – SUPERMOTARD – ENDURO
Rim channel availability
3.50×17 – 3.50×16,5
5.00×17 – 5.50×17
1.60×21
2.15×18 – 2.15×19
Models
Aprilia – Honda – Husqvarna – Kawasaki – Ktm – Suzuki – Yamaha – TM
