TFTunedShox

Following a few years’ absence from the ‘MTB’ game, Olivier Bossard’s company, BOS Engineering, began to make its MTB comeback in 2007 with the introduction of their DH ‘07 rear shock and fork cartridge kits. They’ve been busy applying their bicycle suspension expertise to rally cars and motorcycles and are now doing the reverse. The BOS Cartridge equipped 888 has been ridden to increasing success by privateer Fabien Pedemanaud, who reached 4th place at the final 2007 World Cup in Maribor.

BOS Fork Cartridge Kits (Sorry all sold out)

The BOS downhill fork cartridges are now well-known on the race circuit for their performance improvement. Initially developed for the Marzocchi 888, kits are now available for the RockShox Boxxer.

BOS have used a hydraulic system based on Nicolas Vouilloz and Anne Caroline Chausson’s BOS forks, tested by Karim Amour who has been perfecting the 888, Boxxer and Fox 40 kits over the last three years.

The BOS cartridge kits totally transform your downhill fork, as the original internals are completely replaced by the BOS system. In effect, it’ll feel like a totally new fork!

Most downhill forks work in a pretty similar way. Their weak damping systems aren’t up to the demands of top level racing, and can’t match the ability of the best riders.

How does the BOS kit improve my fork?

The most noticeable difference is the damping. When you brake, it doesn’t dive as much. It does go down (which is necessary), but not as far and it’s more controlled. It’s the same on big compressions, the fork doesn’t sink down as much or spike. It’s the relationship between spring and damping … one is useless without the other!

Effective damping allows the rider to move over the front of the bike in a more aggressive position and keep the speed up over bumps. Now, instead of feeling like the bike comes to a standstill, it will not only keep its speed (even on braking bumps) but also accelerate away strongly after the hit.

You’ll notice an amazing increase in front wheel grip allowing you to track the ground better and you’ll naturally want to bring your weight forward to give better steering, later braking and make it easier to keep your line.

It’s the bike’s higher front-end position which allows you to keep your speed and acceleration, without feeling like the rear suspension is pushing you.

Maintenance and durability

The BOS kit is a lot more reliable than most other fork internals. It’s often the unseen attention to detail which gives better performance. But you’ll only notice this when you ride it … not in the shop window! All the components are hard-anodized, which means the oil stays cleaner and therefore increases the life of the fork. Whereas top riders might be used to doing an oil change on their conventional fork every three months (or weeks … or runs!), BOS recommend one oil change per season for regular competitors, and once a year for amateur or occasional riders.

2008 new developments

As well as the new Fox 40 kit, BOS are constantly developing the performance of their products. The 2008 cartridge kits all benefit from these latest improvements:

• New top caps which are easier to use with gloves on, and a new index system with crisper clicks.
• The Fox 40 has a new adjuster at the bottom.
• For 2008, the settings on all kits are slightly plusher, giving you an even smoother ride. It allows you get used to the feel of the improved suspension action gradually, starting from a softer setting at the start then progressing to a stiffer feel as you get more comfortable with the stronger, forward style of riding.

Price includes VAT but excludes carriage - to order call 01373 826800