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mwart mwart's photo
Jan 24, 2016 at 9:31
Jan 24, 2016
At the top, the reaction force must be at least equal to his weight. This is so that his wheels are pressing against the ramp. If his wheels aren't pressing against the ramp he's falling. So if he were to travel only just above zero, then he wouldn't press into the ramp enough and he'd fall. Like if you've ever been on a gravity wheel at a fair ground. Like you said, we haven't taken any drag into account plus, it may be elliptical so these are only very rough figures.

mwart mwart's photo
Jan 24, 2016 at 7:19
Jan 24, 2016
Sorry man, it's a calculation for MacDuff's world record loop!

mwart the-rise's article
Jan 24, 2016 at 6:56
Jan 24, 2016
Two Days Left to Help Matt MacDuff 'Raise the Loop'
I got that he needs a start ramp just over 15 metres high and needs to hit 62km/hr AND I'm prepared to show my working. ????????
Added 1 photo to Random
Jan 24, 2016 at 6:52
Jan 24, 2016
4 comments – Add comment
mwart hopetech's article
Jan 5, 2016 at 0:07
Jan 5, 2016
Hope Pro 4: Adam Brayton RAW - Video
Hope sure are making a lot of noise about their Pro4 hubs!
mwart konaworld's article
Nov 18, 2015 at 1:51
Nov 18, 2015
Join Kona in the Alps on the All New 2016 Precepts - Video
Could someone explain the main differences between the process and precept in terms of suspension kinematics, ride and manufacture? I'm just wondering what makes this bike their budget offering. There must be differences in terms of the frames performance, or is it down to the spec of the kit on the bike too? Cheers.
mwart BTRfabrications's article
Sep 25, 2015 at 14:43
Sep 25, 2015
BTR Fabrications' New 650B Ranger Demo Bike
Considering the sort of hard tail bike you can get for £1000 the cost of this frame seems a little excessive. I understand that it's hand built in a shed and they'll only sell a few, but wow, that's an eye watering price for 11 tubes of steel welded together.
mwart mwart's photo
Jul 20, 2015 at 10:00
Jul 20, 2015
Ok mate. I'm in the Lake District until then anyway.

Added 10 photos to Buysell
Jul 8, 2015 at 12:54
Jul 8, 2015
Jul 8, 2015 at 12:46
Jul 8, 2015


$800 GBP
Selling for a friend: He has recently started up his own company and is struggling to find time to ride it. This is a reluctant sale, but the bike is currently gathering dust and deserves to be ridden more. The bike has been extensively overhauled recently. New forks, brakes, bars, and drive train have been added. Everything is fully functional and good working order. The frame has new pivot bearings, endcaps and pins and the shock has new bushings fitted. Frame: Santa Cruz Bullit Forks: Rock Shox Totem DH Shock: Fox DHX 3.0 Wheels: Hope Pro 2 with Halo SAS rims Tyres: Maxxis High Roller Rear mech: SRAM X9 Short cage Chain ring: RaceFace Bottom bracket: RaceFace Shifter: SRAM X7 Chainguide: MRP G2 Cranks: RaceFace Evolve DH Pedals: DMR V12 magnesium Brakes: Hope Mono with Goodridge braided hoses Bars: Renthal Fatbar Headset: Chris King Grips: ODI lock-on Stem: Cannondale Saddle: WTB Pivot Seatpost: RaceFace Any queries, then please message me on here. I'll get back to you ASAP and get in touch with my friend to confirm any details/offers. Thanks for looking.

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