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Primoz Added a comment about photo original_BT_20150419_untitled_shoot_004.jpg
4/23/2015 7:38am
And rocks will be saying hello to the sidewalls a lot!
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Primoz Added a comment about photo original_BT_20150419_untitled_shoot_034.jpg
4/23/2015 7:27am
Not a bad idea, if you make a singlepivot frame, weld up the front triangle. Just add another pivot to the seat tube and make it a 4-bar. A good idea production wise.
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Primoz Added a comment about photo original_BT_20150417_untitled_shoot_042.jpg
4/23/2015 6:37am
BB _RISE_?? O_O
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Primoz Added a comment about photo original_BT_20150416_untitled_shoot_296.jpg
4/20/2015 11:37am
THe pivot might be in the way of a normal dropper post. You'd need a really short post with only about 75 mm of travel.
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Primoz Added a comment about photo original_BT_20150418_untitled_shoot_075.jpg
4/20/2015 11:16am
Make it 11spd!! 10-44 sounds ideal! And Sram's 1x11 derailleurs supposedly cover up to a 44t cog.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/14/2015 10:23am
Ont he other hand i have also mentioned here (i think) that internal gearboxes have more drag (due to the whole cogs-bearings-shaft assembly spinning), which people tend not to like or is given as the main reason that prevents widespread use... It's a cruel world!
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/12/2015 12:18pm
True on the bump absorption part, but normal people still take it a bit more easy on a smaller bike
I had a thought to day, i wonder how a virtual pivot point would work on an Effigear. They have the freehub inside the gearbox (and sell you a fixed rear hub, with no freehub), i wonder how having a chain tensioner would work while freewheeling. I suppose chain could get thrown off, since it could just take the slack out of the tensioner and make the chain loose on the top, where it's otherwise supposedly pulled tight.
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Primoz Added a comment about photo original_IMG_0026.JPG
4/12/2015 2:56am
DH rims from ZTR? Is this something new?
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/12/2015 2:08am
This thing needs more reply levels apparently. @kc358 i was merely implying that with an AM/Enduro bike you have much lighter wheels than on a DH bike, so you will take it a bit more slow through the gnarliest of gnar, thereby not needing as high a pivot, as would be useful on a DH bike. That would then create less of a problem with Sram's 1x11 drivetrain, since there would be less chain growth and the derailleur cage geometry wouldn't be as compromised. I totally agree on the AM bike versatility part, people were shocked when i said a...
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Primoz Added a comment about slideshow RIDERS ON COURSE - Lourdes World Cup DH Action
4/11/2015 2:43pm
Specialized is not a trade team at all, neither do they want to be. There's the catch. Syndicate got their application for a trade team denied because of the jerseys.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/11/2015 2:42pm
@Bikeholic that is a point, but i think it's completely safe to assume the efficiency is well over 90 %, more along 95+ %. Compared to riding 2.4 DH vs. 2.0 XC tires that is MUCH less of a difference. Maxxis High Roller II 2.4, tires which i adore, are like an anchor on asphalt. The idler actually has a low wrap angle, it's about (or less than) 90°, where as in the front you're quite close to 180°. @kc358 i'm aiming exclusively at Sram's 1x11 (AM) setups, that have a P shaped cage and horizontal movement. They have the...
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Primoz Added a comment about slideshow RIDERS ON COURSE - Lourdes World Cup DH Action
4/11/2015 3:28am
WTF is up with UCI? DH really needs to get away from it. The EWS guys made a right decision.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/10/2015 11:01am
It's a prototype, it's cobbled together, it has to work, not look preety.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/10/2015 11:00am
The Zerode has a much higher pivot point, i wouldn't be surprised if it has too much anti-squat and a too rearward axle path.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/10/2015 10:59am
I suppose a high pivot is a bit too friendly with braking squat. Both the swingarm rotation (single pivot problem in general) AND the rearward axle path (the axle while braking is pulled backwards) compound the effect. On a normal single pivot when the axle path turns back forward, the effects cancel each other out a bit.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/10/2015 10:57am
A gear pair (two cogs) has an efficiency of 0.99. A ball bearing has an efficiency of 0.99. I suspect an idler sprocket and chain are quite near to 0.99 efficiency, so the end effect is mostly negligible. The problem with gearboxes and their drag is that you always spin the WHOLE system, all the cogs and bearings. That's where drag comes from. A chain and sprocket (pyramid and der.) system don't have that problem. The problem i see is in chain stretch on the bottom, which the derailleur would have to take up. And with Sram's P cage design...
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kc358 Liked a comment about Feature FIRST LOOK: Commencal Supreme V4
4/10/2015 10:54am
I hope, considering they made that prototype. That's what's always bugged me. Sweet BMWs, Zerode, Canfield Jedi, Bulls, etc. that have HPP downhill bikes that I'd love, but I don't ride downhill and none of them make a ~160mm enduro bike with the same awesome design.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/9/2015 1:46pm
Probably just something along the line of a 1.5" headtube.
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Primoz Added a comment about feature FIRST LOOK: Commencal Supreme V4
4/9/2015 11:52am
I wonder if Meta V5 will follow the same architecture, the high pivot point. With 1x drivetrains it sure does get MUCH easier to implement (though there is quite some chain stretch on the bottom side for the derailleur to take care of).
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Primoz Added a reply to 2015 Racing Rumours - MTB Musical Chairs
3/29/2015 1:50pm He is, you can see the outlines of the brake lever & stuff under the bar (the bolt and the bearings for example) and two hoses between the frame and fork, one being the shifter cable, the other the brake hose.