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The mountain bike frame is the skeleton of your bike, it is on this basis that all the components of transmission, brake, steering and wheels will be assembled. Depending on the use, the MTB frame can be fitted with a rear shock absorber or not. For downhill use the travel (displacement of the rear wheel by connection to the frame) will be important while in cross country it will be low or nonexistent, in freeride the amount of travel will be intermediate.
MTB frame choice :
The choice of a MTB frame is made according to the intended use, in fact, a cross country or freeride MTB frame will be light, the position of the will be longer than on an Enduro or downhill (DH) MTB frame which will be shorter and reinforced at the joints and therefore heavier. The suspension travel and the diameter of the brake discs will also be larger on a DH model than on a version intended for cross country, the caster angle of the steering of an enduro or DH mountain bike will be more open for more stability. than on a freeride and cross country model. Ground clearance will be important on DH and enduro models.
The materials used in the manufacture of a mountain bike frame can be aluminum or carbon. Those who practice DH or Enduro mountain biking prefer the use of aluminum because it is shock resistant, while carbon which is lighter and more rigid but sensitive to direct impacts will be more used in cross country mountain biking or freeride mountain biking. However, hybrid assemblies, aluminum front triangle and carbon rear chainstays can combine the advantages of both materials.
MTB frame compatibility :
There are three standard wheel diameters: 26, 27.5 and 29 inches. The 26-inch diameter is the oldest and suitable for small cyclists (less than 1m70). The most used diameter is 27.5 inches because it is suitable for all users of average height (1m75), it is a good compromise between maneuverability and speed. An MTB frame designed for a 27.5 or 29 inch diameter will not work with 26 inch diameter wheels because the ground clearance and the gears will not match the dimensions of the MTB frame.
Peripheral components such as the fork, seat post and seat clamp must match the diameters for which the mountain bike frame was designed. The bottom bracket assembly can be screw-in or press fit type, the thread and diameter of the bottom bracket should match the bottom bracket with which the MTB frame will be assembled.
The disc brakes are fitted by means of an adapter which must be chosen according to the frame or fork attachment, the diameter of the discs and the type of brake caliper attachment.
For the drivetrain, the fixture of the rear derailleur is standard, on the other hand in the case of the use of a front derailleur, if it is fixed by a clamp it is necessary to determine the diameter of the fixing tube of the MTB frame and the direction of cable traction (from the top of the frame or via a path under the bottom bracket).
The assembly of a mountain bike frame requires bicycle tools corresponding to the standards of the components chosen.
The major brands of MTB frames:
Many mountain bike brands have specialized in the design and manufacture of mountain bike frames, each one has its own specificity in terms of geometry and use.
Giant, Commençal or Intense offer models intended for the practice of DH or enduro; Orbea, BH, or Lapierre offer models intended for cross country or freeride; Giant or Btwin are general brands that offer all types of models.
Accessories in addition to a MTB frame:
We offer a large number of complementary components that can be assembled on an MTB frame such as wheels, derailleurs, chains, cranksets, saddles, seat posts, handlebars, stems, forks and shock absorbers. best price up to -70% of their replacement value. Over 350 brands are available in limited stocks.