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Avalancheboy Bormio's article
May 18, 2016 at 1:38
May 18, 2016
Races and Trails are Waiting in Bormio, Italy
Watch this space folks, more lined up for the region later in the year from a team of hardcore athletes who speak your language.
Avalancheboy mikelevy's article
Mar 21, 2016 at 11:40
Mar 21, 2016
OneUp Shark 50T Sprocket Kit - Review
Folks just watch this space, we have something quite revolutionary on the way. Good to see so much enthusiasm for gear box bikes.
Avalancheboy zeptechniques's article
Feb 10, 2016 at 2:41
Feb 10, 2016
Zep's How-To Mythbusters: Body Position for Descending and Corners
Some good points in there for sure and some good debate following. A couple of things that are often left out in a feature like this is the explanation that we (bike and rider) are never static, everything is constantly moving and the appearance or relationship between bike and rider can be captured in a still image showing either end of the spectrum. I've viewed many hours of slo-mo video and looked at tens of thousands of sequence images. There just simply isn't enough space in web and print features to use the amount of text required to truly unravel the intricacies and complexities of the physics and applied techniques in this sport. I can spend a whole day with a rider teaching them and I feel I've only scratched the surface of what I've discovered through riding different bikes in different disciplines over the last 30 years. The other missing nugget of gold is the difference in technique for different bikes (brushed on here with 90's geometry reference) and different physiology types. Geometry, suspension travel, rider strength, agility and ability, speed 'vs' Gradient. severity of trail surface (loose, compact, size / scale of feature). At every opportunity you can learn something, it just may just be that your learning how not to do it.
Avalancheboy mattwragg's article
Oct 12, 2015 at 11:03
Oct 12, 2015
Techwalk: Roc D'Azur 2015
Friction is an issue for sure, the chain is so efficient with minimal power loss. There is always a trade off whichever way it goes, dangling bits that cost a fortune getting ripped off by rocks and so on or stronger legs from an added bit of resistance. Lets hope we can minimise the drag and get internal gearing sorted. Imagine coming at the thing the other way! Lets say if internal gears with their drag were the norm, everyone does it. Would you swap that for the new craze of 'the chain' with its efficiency and the deraillieur?
Avalancheboy mattwragg's article
Oct 11, 2015 at 8:39
Oct 11, 2015
Techwalk: Roc D'Azur 2015
Yes prop driven bikes have been around for years and are a great solution. The weight is often the issue but nothing modern materials can't solve. As I said it won't however happen in the mainstream until the price point per unit makes it attractive to the accounting department. In actual fact gearbox systems in automotive are not that complex, cogs, strait cut or syncro, dog ring, shafts, lubricant and casing. The math behind gear profiles is what it is and solutions exist in abundance. THE complex things humans present over combustion engines is force, sudden and lots of it! The "clever" uh hu people at Bosch spent millions on early e-bike motor technology only to discover that if you smash a pedal off the ground it wrecks the internals due to a sudden load in a less desirable direction to the internal drive parts. I'm often amused by half wit 'educated' engineers with degrees and no practical skills making this kind of cock up.
Avalancheboy mattwragg's article
Oct 10, 2015 at 11:36
Oct 10, 2015
Techwalk: Roc D'Azur 2015
Do you see the gears located on the outside of a rally car or 4x4? The chain drive and derailleur are something a Victorian would recognise, located in a terrible position exposed to the elements. Internal drive and gear systems are THE way ahead, the technology is there to make them robust and light enough to match that of the Victorian tech. However built in obsolesce and an industry full of half wits means we wont see a "commercially viable" solution anytime soon.
Added 6 photos to bikebits
Jul 11, 2014 at 11:22
Jul 11, 2014
Selling
Jul 11, 2014 at 11:14
Jul 11, 2014

Truvativ AKA Crankset 175mm 2x or 3x 10 GXP

$40 GBP
Used with scuff marks and odd knock from flying rocks Truvativ no thrills crankset - AKA model in 175mm Suitable for 2x or 3x chainrings - GXP BB type (not included) Price includes postage

Added 8 photos to bikebits
Jul 11, 2014 at 11:02
Jul 11, 2014
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