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Added a comment about photo Lars Sternberg's Prototype Transition Enduro Race Bike 7/26/2014 1:02 AM
C138_pit_bits_3

The rocker's shape screams Rocky Mountains (Slayer) to me for some reason. Which is definetly not bad!

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Added a comment about photo Jared Graves' Prototype Long-Travel Yeti SB6C with Switch Infinity 7/25/2014 8:32 AM
C138_jaredbikenondrive

AFAIK that's 100 active hours. So quite a long time as long as you don't do bikeparks.

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Added a comment about photo Jared Graves' Prototype Long-Travel Yeti SB6C with Switch Infinity 7/24/2014 2:23 PM
C138_jaredbikenondrive

Well we don't have only single pivot designs. And it's not all about the way the suspension travel works. You need to factor in maintainability (changing bearings is simple, you need to order a new set of rails for this), the cost (the design of this frame or the modl for it is probably quite complex) and the stiffness. If you connect the stiffness and maintainability, what will happen when the bushings wear out in the switch link?

I'm all for progress, but lets make that progress sensible. I don't see what's wrong with normal bearing and 4-bar linkages (mechanisms). They are proven to be working. And they can be made in a simple and stiff manner.

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Added a comment about photo Jared Graves' Prototype Long-Travel Yeti SB6C with Switch Infinity 7/24/2014 2:12 PM
C138_jaredbikenondrive

Apparently it could get in a situation around the switch point where it would stiffen up. Though that was expirienced mainly by the faster, harder riders. Or something like that.

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Added a comment about photo Jared Graves' Prototype Long-Travel Yeti SB6C with Switch Infinity 7/24/2014 2:11 PM
C138_jaredbikenondrive

It's not all about the travel, a good rider with 140 mm can keep up with someone else on a much more modern bike with 165 mm of travel, where the skill level doesn't differ that much. True, it depends on the trail, it can't be pure gnar, but even a 160 mm bike with todays design won't hold up all that well in that either.

More isn't always better. I was wondering how a 130 mm bike would hold up at enduro events. With the fitness level these guys in the EWS have it probably wouldn't be a benefit, but for more recreational racers it might be a better choice (a lighter bike that's more chuckable). Though on the other hand more travel forgives the less expirienced riders more...

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Liked a comment on the item Jared Graves' Prototype Long-Travel Yeti SB6C with Switch Infinity 7/24/2014 2:06 PM

im still under the impression that this is over complicated and partially a marketing gimmick. i mean do they really need fox kashima coated switch rails...

Added a comment about product review Tested: 5.10 Impact VXi - Real Sticky-icky 6/29/2014 2:37 AM
C50

Wide toe box and high archs upport is all fine and dandy, but what bout riders that don't have both types on their feet? That have a low arch or a narrow foot or, the worst combo it seems, a narrow and low foot? Will these shoes be horrible then?

The old impacts are way too wide for me, i have about a centimeter of floating space left-to-right and lacing them up tight over the lower part of the foot is also an impossibility. Seems 5.10 should be using a few different molds for their shoes, maybe at least two. Sidi for example has a tall/wide foot edition of some of their XC/road models...

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Liked a comment on the item Brook MacDonald's Wild Ride at Leogang 6/13/2014 2:53 PM

incredible, dude is insane.

Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/12/2014 8:12 AM
C50

So Dave is the guy that made a bike at home (as the diploma/masters project) and got a job with Trek?

Anyways, did you swap around the sides of the crank and swapped out the axles of the pedals, screwing them in 'the other way around'?

EDIT: enver mind, i looked at allt he pics and saw the chainring is in the middle, so not on the cranks at all...

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 2:52 PM
C50

I can assure you that you can write G code in milimeters. And at the end of it all it's just an option in the interpreter, the most important part of the CNC machine is how far the movement system must move. And that doesn't work in either metric or imperial units. If a stepper is used, you emasure steps (or half steps). Etc.

Also, i suspect a big part of the shock is not milled, but forged (the outer damper body, the kashimad part, and the top eylet), deep pulled (the aircan i suppose) and probably something else as well. Sure, there is milling also done, but as a final operation i suppose. But the point still stands, it's not an imperial world when it comes to milling, far from it. Maybe in the USA.

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 2:33 PM
C50

Yeah, it's a 'cost lowering' thing... Well, it is, since all GT3 (and Le Mans Prototypes as well) cars run on 18" tires, so the development could be made cheaper and faster. At least going to 18" tires is a condition for Michelin to return. Pirelli might be happy with the 13" they use now.

As for the suspensions, want your head to explode? Inerters. http://www.racecar-engineering.com/articles/f1/understanding-the-j-damper/

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 2:16 PM
C50

Nitpicking a bit, if we talk about F1 specifically, the tire is actually a REALLY integral part of the suspension. The proposed move to 18" wheels would completely destroy that.

As for the suspension and downforce, more or less every high downforce car uses a third spring to counteract the forces. The car is really stiff in double bump (which is worse when it comes to braking and accelerating weight transfer), while that third spring does nothing in roll (or single bump).

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 1:55 PM
C50

Oh, seeing we have a Penske engineer: how does the engineering work look like, do you guys use the metric or the imperial measurment system when desiging... well bikes (Trek), cars, shocks, etc. (Penske)?

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 1:41 PM
C50

As far as i understood he headed the project on Penske's side.

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 1:39 PM
C50

Fox should really do the same as Rock Shox does. Service manuals on the internet and a completely serviceable shock. That would make servicing a whole lot easier (and cheaper).

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 1:38 PM
C50

As said, the standard was not the limit. If you need more stifness, use stronger spokes and rims or use bigger flanges all the while using the same hub standard. Have you seen an average rider? I'm far above average and i really doubt i'd percieve the difference in a blind test.

There are a lot more areas that need imrpovement than the stiffness of the rear axle, IMO.

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 1:26 PM
C50

AN engineer, that looks at the obvious test data and decides that it's a smart idea to incorporate a new, scarcely supported standard, should be shot. If not him then his supervizor or product manager.

Yes, it's stiffer. Yes, it's better. But where the hell will you get a new hub quickly, when this one gives up? This problem has been solved, you just need to use large diameter flanges and the effect is the same with no need to use special, weird standards that nobody uses.

Yes, a large flange hub crapping out will mean it won't be as stiff. But you'll still be able to ride. And trust me, that is worth a whole damn lot (tomorrow will be 2 weeks since my last ride because i'm waiting for a new derailleur hanger).

As for being too large, the large players are exactly the ones that can do this kind of stuff. Lok at their DRCV shocks. Or Specialized's 142+ and custom autosag/yoke shocks. They have the sales numbers that support custom hardware. Which just causes problems down the road.

EDIT: as for the new standards, KISS!

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Liked a comment on the item Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 1:22 PM

Also WTF Trek. Another axle size? Seriously. Why do people buy bikes from companies like Trek who make it that hard to like them.

Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 12:00 PM
C50

150 mm hubs are just liek 135, they have no tabs for the throu axle designs to sit on, making the aligning and axle insertion 'hard'. That's why 142 came to existence (3,5 mm on each side acts as a lip, on which the hub rests for the axle insertion). What this 148 brings i have no idea though.

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Added a comment about feature Formula 1 Meets Mountain Biking in Trek's New RE:aktiv Suspension 6/11/2014 11:59 AM
C50

What did you do if it's not an SPV then?

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