Mountain Tamer Construction
Piece By Piece Breakdown
The Mountain Tamer “Flex” front arm has a side to side articulating motion that can be adjusted from 8° all the way down to 0° of motion (locked out). As you lean the bike the arm pivots allowing the rails to “Flex” side to side to create the leaning motion. This allows you to be able to lean more easily while the track transitions from flat to on-edge when riding down the trail, making the snow bike feel more like you’re riding on tires while the back portion of the suspension leans with the bike keeping the cutting edge portion of the track to remain effective while cornering.
The Mountain Tamer suspension uses 2 precision tuned FOX Zero Pro Shocks with coil springs and internal jounce bumper bottom out systems. The arms are constructed of tig welded 4130 chromoly steel tubing. All moving parts are bushed and all shafts are hard anodized aluminum. The slide rails use snowmobile style hi-fax for easy replacement and include an 8” 2-wheel axle assembly that is adjustable for proper track tension.
The fiberglass stiffener rods that are molded inside the track are 3” narrower than the width of the track; this allows the outer 1 1/2” of the track to be flexible giving your bike a sweeter roll center making it feel more like a tire. The flat topped track allows your snow bike to stand up on its own when sitting on a flat surface or on the snow without the need of a kick stand. This design also provides the best possible traction in the soft snow. The track design is a Camoplast Challenger Extreme that is commonly used on snowmobiles. It is a single ply, 2” paddle by 12.5” wide by 2.86 pitch and comes in 2 different lengths: 120” (ST kit) or 137” (LT kit). The track uses an 80 durometer rubber that is stiffer than our original model.
Note: The SX kit uses a different style of track. It is 2” narrower, has a thicker paddle, and has a harder 87 durometer rubber. The track on the SX is a Camoplast Rip Saw, 1-3/4” paddle by 10.5” wide by 2.52 pitch by 121” long.
All other components of the snow bike kit such as the tunnel, Mountain Tamer rear suspension and drive system are mounted to the sub-frame.
Note: This is mounted differently on the SX model kit. The SX has a different design sub-frame that is bushed and pivots like the stock motorcycle swing arm. The strut rod pushes on a linkage arm that activates the secondary suspension.
The drive system uses the highest quality parts possible that are capable of handling triple the amount of HP and have been tested to have the best wear resistance in wet snow conditions. The sprockets and axles are made from hardened 4140 chromoly steel. The 2 chains are EK 520 SRO-5 O-ring and are both tension adjustable. The axle bearings are the same size as those used in snowmobiles and are greasable for long bearing life.
The brake system uses a disc brake on the jack-shaft and a dual piston Wilwood brake caliper that attaches to the stock foot brake master cylinder or can be mounted to the stock R-S hand master cylinder with the use of a longer brake line (available on our Accessories Page).
In our real-world testing we have experienced no bent forks to date and the spindle has never been damaged to the point of not being able to ride the snow bike out of the back country. At the bottom of the spindle it has a billet aluminum bottom that is bolted to the spindle and attaches the ski. This part allows the ski to pivot up in the front but not down in the back with a rubber bumper under the ski that resists the movement; this keeps the bike a-float on top of the snow by letting the ski angle up in the front a limited amount.
It has some similarities to some of the other Simmons skis but has a totally different function that is specific to the handling needs of a snow bike. It is an all-in-one ski eliminating the need to change it for different snow conditions (this is something that has been a real issue for snow bikes until this ski was produced).
The ski is available as an upgrade on our Snow Bike Accessories page.
Awesome Features of Our Kits
- 10” wide with 3 keels that allow for precision handling and best possible flotation in the powder.
- The new dual track center skag allows the 10” TS Backcountry ski to track 50% better than before. It allows you to ride down the trail with the comfort of minimal darting or shiftiness. This skag is also available for previous year TS Backcountry skis.
- Outside keels are only 3/4” wide and are a 1” shorter than the center keel. They are located to the very outer edge of the ski so they provide super secure feeling when side hilling and cornering.
- 3-1/2” of space in-between keels. This allows enough space to prevent freezing or plugging up with snow.
- With the combination of the center keel being taller than the outers, when you lean or side hill you are always on 2 keels. This allows the ski to track very straight without darting and provides very easy steering in most conditions.
- Front outer edge of the ski has a 1/4” tall ledge leading from the front of the outer keels to the ski-loop. This makes the ski respond instantly in soft snow when you steer into a side hill with out slipping out to the side.
- Front leading edge of the 2 outer keels are farther forward of the leading edge of the center keel. This adds steering responsiveness and eliminates front end push in soft snow.
- Straight cut grooves in the bottom of the ski that extend full length and are 1/2” apart. This helps with straight line tracking on set up snow conditions such as on the trail and in wet snow.
- 3 mounting positions for the ski saddle. This allows you to position the ski forward or backward to change the steering characteristics.
- All 3 ski skags are inserted with carbide down the full length of each skag so they will last a long time. The back half of the skags have 60 deg carbides that stick out for stability on ice and make the ski track straighter.