JHOP 100 Century Ride 3:47

ed72

Zen MBB Master
65-36 is about the biggest jump that can be MADE to work although 61-36 is pretty doable.
 

Barefoot Biker

Active Member
Screen Shot 2019-12-06 at 1.53.23 PM.png

Here it is in the configuration it had last weekend. Yes, SRAM red, blips under my fingers, blipbox on the stem which I use to bring one arm out of the wind when on the front.
 

Bill Wightman

Well-Known Member
Is that an optical illusion or are you running a real low tire pressure in the front? I usually run between 80 and 90 psi min on a 25 mm to avoid pinch flats. Do you have an estimate for the total bike weight as configured?
 

Barefoot Biker

Active Member
i hadn't noticed that. that's 23mm at 95psi in the front, 25mm at 95psi in the back ... i've been meaning to get it on a scale. i think larry has measured the weight, but i have not. it's definitely heavier than the vendetta - significantly heavier, but not so much that it would show in the wheels in that picture. i'm roughly 170lbs myself - maybe this was on the way back from the gas station after a burrito?
 

3bs

whereabouts unknown
i think given your excellent ride speed and my marginal ride speed, i am going to blame the extra 40lbs of human ballast i am carrrying......
 

ricardo

Member
I am in FL next time Let me know I have one I never get to ride with another VENDETTA look at recumbent central florida on face
book
 

Bill Wightman

Well-Known Member
One of the underappreciated features of the MAGIC design is the shielding of the upper portion of the front wheel from apparent air flow. Since the upper wheel is going twice the speed of the bike, it generates a disproportionate ( and nonlinear) level of drag. Eliminating some of this drag is a really beneficial feature. Only shielding the top third of the front wheel is efficient. Anything that keeps the flow clean for as far aft on the bike as possible is good unless it adds additional skin drag. If this very nice design becomes more available I hope the nose in the front is removed/minimized as IMHO (and from my eyes only secret CFD analysis) it actually slows the bike down. The beak also may generate unwelcome steering momentum and twitchiness in crosswind gusts. Also the rider height may be in the sweet spot between being above the danger zone for visibility and vehicle safety and also high enough to eliminate parasitic drag from close proximity to the ground. Another thing is that it will need a weight scrub or all the benefits of the MBB on hills may be lost. My two cents.
 
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