groghunter

Tucson Off Road Cyclists & Activists Board Member. www.torca.org

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groghunter mikekazimer's article
Sep 23, 2016 at 7:11
Sep 23, 2016
Randoms Round One - Interbike 2016
@Coyotecrash: doge no fat. doge haz big boenz. such sad.
groghunter RichardCunningham's article
Sep 23, 2016 at 7:02
Sep 23, 2016
Topeak Is More Than Tools - Interbike 2016
Those swinging bike hooks are cool. I use one from Feedback Sports. I like them because I can put a bunch of bikes in a smaller space, & then use the swinging action to move other bikes out of the way to pull the one I want to ride. This Topeak one looks a little nicer, especially for big tires, which is something the feedback one struggles with, even with the optional longer hook.
groghunter RichardCunningham's article
Sep 23, 2016 at 7:00
Sep 23, 2016
Topeak Is More Than Tools - Interbike 2016
Feedback sports makes one as well. Only thing is it's a pretty tight fit with the stock hook, but they make a longer one you can order.
groghunter RichardCunningham's article
Sep 23, 2016 at 6:41
Sep 23, 2016
Pinion's Affordable Gearbox Nears Production - Interbike 2016
@ZigaK13: No, the pinion will end up having a belt (because that's how they're getting weight competitive with conventional drivetrains.) which don't have the efficiency loses chains do. The point I was making about the grinding, squeaking chain is that if at least half of all riders generally wait that long(& make no mistake, if the efficiency loss was noticeable in a "seat of the pants" way, people wouldn't) that the lower efficiency of a gearbox isn't going to be the deal breaker some people make it out to be.
groghunter RichardCunningham's article
Sep 22, 2016 at 11:31
Sep 22, 2016
Pinion's Affordable Gearbox Nears Production - Interbike 2016
@ZigaK13: cool. So I have some issues with this. it's better than nothing, but: At it's worst, it's testing brand new chains that have had 5 dirty races on them. Who runs a chain for 5 rides? They were also cleaned & relubed after every ride, another thing many riders don't do(how many riders do you know who ignore the chain until it makes noise? I barely pay more attention than that, personally) Even then their data shows that a cleaned & relubed chain, after one race, still has more friction than the brand new one. I might replace a chain once a year. probably more like 2. I don't lube more than about once a month (partly because Purple Extreme is awesome, but still.) I don't do their "Ultrafast Process" on my new chain, whatever that is. When I relube, I don't "For Part 3, the cleaning and relubing, the six chains were submersed in a container of solvent and aggressively agitated. They were then transferred to an ultrasonic cleaner and US’d for 10 minutes submersed in lacquer thinner, then flipped for an additional 10 minutes of US cleaning. The chains were then transferred and submersed in a bath of Rock-n-Roll Gold lube in a US machine for a total of 20 minutes; 10 minutes on one side then flipped for another 10 minutes." Nor should I, because the grease the manufacturer pre-impregnates a modern chain with is better for long-term lubrication & keeping water out than any chain lube, which is why anyone who isn't racing at this level should stay away from using solvents on their chain at all. Really, the only thing I can take away from this article is that: a chain that has been professionally setup for high efficiency, at the cost of lifespan, has about a 5w efficiency loss, that even cleaning & relubing every ride, than number can go up to 12w fairly quickly, & that most of us are probably starting from 8-10w or worse with a brand new chain, & the number goes down from there.
groghunter mikelevy's article
Sep 22, 2016 at 8:48
Sep 22, 2016
Tioga, 6D, Renthal - Interbike 2016
@WAKIdesigns: The only studies I've seen that seemed to be properly scientific, showed basically no difference between clips & flats. I'd still use them on a road bike though, because they're lighter, & because they take the thought out of foot placement, which is beneficial when you're on tilt after 80 miles of riding. I actually sometimes get annoyed at my feet moving around on long pedally sections even on the MTB. love that flexibility for descending, but it doesn't really do much for me on the ups.
groghunter mikelevy's article
Sep 22, 2016 at 7:36
Sep 22, 2016
Tioga, 6D, Renthal - Interbike 2016
@WAKIdesigns: Neither Truvativ or PRO offer 35mm stuff, even those new DESCENDANT parts are 31.8. I actually think that's one of the most interesting aspects of this, actually: neither of the 500lb gorillas of the bike industry has signed on for this particular standard, & remember that SRAM is, according to internet commenters, the evil new standards company.
groghunter RichardCunningham's article
Sep 22, 2016 at 6:43
Sep 22, 2016
Pinion's Affordable Gearbox Nears Production - Interbike 2016
@ZigaK13: Can't look at it due them wanting to charge for it, but they say it's after cyclocross racing. I'd like to see how bad it is after the kind of DH race where you have to pressure wash your bike to get 5 lbs of mud off after each run.
groghunter RichardCunningham's article
Sep 21, 2016 at 15:25
Sep 21, 2016
Pinion's Affordable Gearbox Nears Production - Interbike 2016
@ButtersNZ: Shouldn't matter. you're not moving a chain across a cassette, you're just changing which gear set in the box is engaged. but all the gears are always meshed with each other.
groghunter RichardCunningham's article
Sep 21, 2016 at 15:08
Sep 21, 2016
Pinion's Affordable Gearbox Nears Production - Interbike 2016
@ButtersNZ: Also, you can shift under load & without pedaling. @WAKIdesigns: you got me backwards: I want someone to test a dirty conventional drivetrain. As long as the gearbox is sealed, I don't see much point in testing how it preforms after you've ridden through the mud, because the answer will be "exactly the same."
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