Archive for March, 2009


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Mar 06 2009

Mountain Bike Survival Kit

Published by Sam under Maintenance


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The mountain biking survival tips are as follows:

Water and food
Whether it is summer or in the middle of the winter season, you as a biker need to drink plenty of fluid and eat a substantial amount of food. Bring high energy food and enough water or energy drink to stay keep you hydrated during the course of the trip. Powerbars or energy bars are recommended since they are compact and easy to carry. If powerbars are not available, you can bring fruits such as bananas and apples. Always pack extra food in case you have to stay longer on the trail.

Clothing
Wear clothes that are suited for the type of weather. If you are riding in summer, bring light clothes made from breathable fabric. Winter riding requires layers of clothing that may include a t-shirt, a long sleeve shirt and a brightly-coloured jacket so that you can be properly seen in the middle of the snow.  Remember more thin layers are better than one thick layer, more layers create layers of air between them which act as an insulator.

Gears
First things first: never ride without wearing a helmet. Then wear gloves for better grip and comfort. Gloves can also protect your hands in case you suffer a crash and use your palms to absorb the fall. Don’t forget sunglasses, they serve as a protection against foreign objects that might enter your eyes. Depending on the colour of the shade, sunglasses can enhance the colour of the road or trail.

Tools
Torch!!  Tire blow out can happen anytime while on the trail; always carry bike and tire repair kits that include multi-tool wrenches, pump, tire gauge, patches and glue. Do not forget a spare inner tube.

Navigation
Bring a map, a compass or a GPS in case you are unfamiliar with the biking trail.

Trip Planning
Like a good Boy Scout, be prepared. Pack everything you need before the trip.

To summarize all these, your backpack should contain the following: enough food and water, sunscreen, mobile phone, pump, tire gauge, patches, glue, spare inner tube, multi-tool kit, first aid kit, wallet with identification and extra money, torch, a navigation tool like compass or GPS, a map, and a lighter.

(Do not ride alone.)

Protect yourself from heat.

Mountain forest In case it rains, stay high and dry. Create a make-shift shelter on the highest area of the terrain. Do not ride the storm especially if it comes with lightning.

If you are going to stay overnight, make a fire before it gets dark. Keep it alive throughout the night. Fire keeps predators away.

Temperature can plummet when dark sets in. http://www.articlesbase.com/

Medical Career – Advice http://www.newmedicalcareers.us Mountain Biking – Getting Started http://www.mountainbiking.co.in Affiliate Programs http://www.okus.in Ultimate Frisbee http://www.ultimatefrisbeepro.info

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Mar 05 2009

Floating Bottom Bracket Suspension

Published by Moderator under Suspension Types


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This particular idea was pioneered by GT as a basis for their I-Drive suspension system.  This system places the bottom bracket along with the crank assembly component on a pivot point that is separate from both the front and rear triangle of the bike resulting in the bottom bracket and crank assembly effectively floating.  This is the unique feature that distinguishes the floating pivot design from other active full suspension systems which have the bottom bracket mounted on either the front or rear triangle of the bike.

 

The floating bottom bracket design maintains most of the quality characteristics associated with VPP and horst link/four bar suspension systems.  The floating bottom bracket design has the technology within the design to minimise pedal bob (if correctly calibrated) and also remains resistant to braking compression.  This means that even under braking the suspension remains active making for a smoother riding experience for the user and improves the traction of the bike by keeping the back wheel in contact with the ground for longer.

 

It is general opinion that the floating bottom bracket design has potential to be a brilliant all round solution, however although models have improved, there is still a lot of improvement to be done.  One problem with this type of suspension is the added weight which comes purely due to the complexity of the design, although the current I-Drive is now much lighter than the original, it is still a little on the heavy side, making climbs tricky.


 

 It is not just the I-drive that utilise this floating bottom bracket design, there are a couple of other manufacturers that make use of the idea, however they each have their draw backs.  One flaw comes from having the crank assembly mounted on a floating pivot, because of this a special front derailleur has to be fitted to counteract the motion created at the pivot point, despite this there are instances and cases of shifting trouble on the front gears.  It is also noted that this type of suspension causes the seat post to be at a slightly unfavourable angle with some riders making a correct pedalling position difficult to achieve. 

 

All in all, this system has some good points, eliminating pedal bob and compression under braking, however it still lacks some of the simplistic refinement found in other suspension solutions.

 

 

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