Winner over test winners

A Cross Country Classic on the Pulse of Time

Clear air, real nature - free at last. Feeling the terrain, really pushing it or relaxing in a sporty way – the BULLS Copperhead is the perfect companion. Without frills and yet always at the latest technological en development standard, fans and press are impressed, every year yet again. The Cross Country all-rounder has bagged many test wins and in its price class of around 1,000 euros, it impresses with a maximum of performance and equipment.

No wonder then that the Copperheads belong to the most sought after Hardtails of the sector and are often sold out as soon as the seasons starts. Since 2007, the bestseller is being further refined every year and fitted with sensible innovations, so that the perennial is continuously significantly improved. However, the basic values of the success model are not touched: Perfect frame geometry, filigree processing quality and amenities that can't find their equal in this area, mark the unmistakable character of every individual Copperhead.

Perfectly attuned to sporty, ambitious riding, the Rock Shox Reba spring fork, XT components and the hydraulic Shimano disc brake in the Ice-Tech variant equip the classic with the necessary potential, even for the toughest tours through the wild. Since 2014, the Copperheads run on the enlarged 27.5 inch running wheels. Extra grip in bends, more speed and sovereignly negotiating roots and stones thanks to the flatter approach angle give the rider still more control and comfort, in conjunction with the snappy Schwalbe Rocket Ron tyres.

Detail images


Press Fit


press-fit bearing is pressed into the bottom bracket shell and not screwed, as

would be usual. The resulting force-lock fastens the bearing in the housing.

The press-fit inner bearing increases stiffness of the crank/inner bearing

combination, increasing the bearing's service life at a lower weight.

Tapered Steerer

Semi-integrated headsets with an inner diameter of 1 1/8 inch on top and 1.5 inch

at the bottom ensure best riding stability and excellent control head

stiffness. The stiffness of the fork profits from the more voluminous shaft,

and the forces are discharged into the frame better and with less strain on the

material through the higher-volume control tube.

Tailored Chainstays


frames require longer chainstays. The result is a much improved climbing

capacity, which is relevant in large frames. After all, the centre of gravity clearly

shifts backwards with a tall rider, specifically at inclinations. Taller riders

also need more space since they usually have longer feet, and for the longer

cranks to avoid touching the chainstays with their heels.


The travel of the fork is 100 mm.

Triple Butted


Butted" means triply conified wall thickness areas with a flowing

transfer. The strength is sufficient at the centre of a tube and the tube walls

can be kept thinner there. For best force distribution in the tube "Triple

Butted" tubes are also applied with different wall thicknesses at the ends.

10-Speed Drive Train


cassette has 10 gear steps instead of the 9-speed cassette. This primarily

permits a finer selection of gears and improves efficiency to warrant higher

power output. 


Category Hardtail
Area of use XC--Marathon--Tour
Frame 7005 superlite aluminium, triple butted, smooth welded
Frame Size 41/46/51/56 cm
Weight ~ 10,9 kg
Fork Rock Shox Reba RL 27,5 Solo Air, 100 mm, pushloc remote lockout
Rear derailleur Shimano Deore XT RD-M786 SGS, 3 x 10-speed, shadow plus
Front Derailleur Shimano Deore XT FD-M780
Shifters Shimano Deore XT SL-M780-I
Handle Shimano FC-M622, 40/30/22T - PRESS FIT
Cassette Sprockets Shimano Deore SLX CS-HG81-10, 11-36T
Brakes Shimano Deore BR-M615 Ice Tech hydraulic disc, 180/180 mm
Handlebar Kalloy UNO (Grade 3.0)
Stem Kalloy UNO (Grade 3.0)
Seat post Kalloy UNO (Grade 3.0)
Saddle Fizik Nisene
Hubs Shimano Deore XT HB-M785 /FH-M785
Spokes stainless
Wheel size 27,5 Zoll
Tyres Schwalbe Rocket Ron Evolution 27,5 x 2.25
Pedals Wellgo
Extras -
Rider Male
Colours black matt/white, white matt/black matt, grey matt/black, neon yellow matt/black matt
Item number 552-25241, 552-25441, 552-25341, 552-25541
Price (RRP) 1.049,95 €


Sitzrohrlänge Oberrorhlänge Kettenstrblänge Tretlageroffset Steuerrohrlänge Lenkwinkel Sitzwinkel Rahmen
Frame SizeS(41)M(46)L(51)XL(56)
Seat tube lengthA410mm460mm510mm560mm
Top tube lengthB575mm595mm615mm635mm
Chain stay lengthC440mm440mm445mm450mm
Bottom bracket offsetD45mm40mm40mm35mm
Head tube lengthE100mm120mm145mm175mm
Head tube angleα70°70°70°70°
Seat tube angleβ73°73°72,5°72°
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