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Is it safe to get "aero" on a MTB ?

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Is it safe to get "aero" on a MTB ?

Old 02-24-10, 06:02 PM
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Is it safe to get "aero" on a MTB ?

I'm talking about paved road descents which get me to about 30 mph if I tuck and lower my head. My concern is that, since a MTB is not really designed for fast aero positions, I loose a little stability, and even worse, it gets hard to keep looking ahead at the road because of my head being almost facing down.

So, do you think it is safe.......to get "aero" on a MTB ?
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Old 02-24-10, 06:04 PM
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'Flat track tuck' with right hand still on some controls, elbow in, and you're good.
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Old 02-24-10, 06:33 PM
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Originally Posted by dminor
'Flat track tuck' with right hand still on some controls, elbow in, and you're good.
Not really getting the picture though........
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Old 02-24-10, 06:37 PM
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I've never noticed any real *stability* difference between my road bikes and mountain bikes under the conditions you describe.

Bikes will rarely develop a wobble or shimmy at particular speed ranges, but that's generally an oddity of the frame-fork-wheel combination, and just as likely to happen on a road bike (IMO).
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Old 02-24-10, 06:58 PM
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I think he's asking more about narrow tucks with odd hand positions that might compromise control?
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Old 02-24-10, 07:16 PM
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Originally Posted by dminor
I think he's asking more about narrow tucks with odd hand positions that might compromise control?
Well I'm no expert on the subject to start with, I just lower my head, try to get it closer to the stem (though not completely), and keep the hands on the handlebars. But then the problem is keeping the neck up to look up the road. I do this seated. I haven't done it pinching the seat between my thighs, like I would do on a rocky technical descent, because at high speeds that just seems like it would make me loose even more stability and confidence.
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Old 02-24-10, 07:23 PM
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If you have aero bars it can be done... otherwise it can be cramped and hard to maintain control... such a maneuver is best for smooth quiet roads.
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Old 02-24-10, 07:37 PM
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Hold your fork as you are descending it's the best.

https://www.bikeforums.net/showthread...o-is-most-aero
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Old 02-24-10, 07:40 PM
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Originally Posted by mystolenbikes
Hold your fork as you are descending it's the best.

https://www.bikeforums.net/showthread...o-is-most-aero
Is he wearing a mouth-guard? if not he should be!!
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Old 02-24-10, 08:49 PM
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Wow.......just wow.
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Old 02-24-10, 09:38 PM
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ride your mtb on the dirt and rocks. when you crash go aero as to not hit everything on said dirt and rocks.
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Old 02-24-10, 09:54 PM
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Well they used to make MTB aero bars...............I'm rocking a set on my vintage Giant.
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Old 02-25-10, 05:34 AM
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Originally Posted by craigcraigcraig
ride your mtb on the dirt and rocks. when you crash go aero as to not hit everything on said dirt and rocks.
Well unless you're a hillbilly you have to ride through the road to get to the dirt and rocks.
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Old 02-25-10, 08:11 AM
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It's great to be a hillbilly.
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Old 02-25-10, 08:14 AM
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Originally Posted by zeo_max
Well unless you're a hillbilly you have to ride through the road to get to the dirt and rocks.
This thread is making me laugh, dood.

Kind of a subjective question, don't you think? If you have a great sense of balance...then standing on your saddle and handlebars is technically "safe". If you are a die hard roadie, then riding in a normal position on gravel is terribly unsafe.

The only way to answer your question zeo, is to try it and see how comfortable you feel.

There's a paved hill that I descend sometimes behind a local theater that's pretty big...half the time, I'm sitting on my top tube against the seatpost gripping the bars right at the stem. Dunno how fast I'm going at the time, but it's completely safe. As is the bunny-hop over the median at the bottom of the hill. That's just because of my comfort level...not because of the inherent danger.
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Old 02-25-10, 08:56 AM
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Originally Posted by chelboed
This thread is making me laugh, dood.
Isn't that the point of every BF thread ?
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Old 02-25-10, 10:27 AM
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Descending in the drops of a roadie is more a downward position than on those of the straightbars on an MTB, why would you be face down on an MTB with the higher bars?
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Old 02-25-10, 10:38 AM
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Originally Posted by Mr. Beanz
Descending in the drops of a roadie is more a downward position than on those of the straightbars on an MTB, why would you be face down on an MTB with the higher bars?
Well maybe you can answer that for me with your road bike experience. When you are in the drops of the roadie, do you have to lift your neck to look forward ? (cause I find that rather uncomfortable)
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Old 02-25-10, 11:24 AM
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It's not like you'd get eaten by a whale, you'd just crash.
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Old 02-25-10, 12:01 PM
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Originally Posted by zeo_max
Well maybe you can answer that for me with your road bike experience. When you are in the drops of the roadie, do you have to lift your neck to look forward ? (cause I find that rather uncomfortable)
Depends on how aggressive the road bike is. My head is slightly lifted on my road bike. It's not uncomfortable. I have to look up a lot more on my tribike, which I wouldn't want to be on for a century. But that's no different than mountain bikes. You have to lift your head a lot more on an XC bike than a downhill bike. If it's that uncomfortable, why bother? It's not like you're doing a road race on your mountain bike.

Are you really pinching the saddle between your thighs when you descend? Someone gave me that advice when I first started riding, but I've since found that I have more control when I let the bike move underneath me. Makes it easier for me to move my body weight around too. But as I said, that goes against the advice I originally received, so maybe someone who's better at descending can weigh in.
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Old 02-25-10, 12:22 PM
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Originally Posted by Zephyr11
Depends on how aggressive the road bike is. My head is slightly lifted on my road bike. It's not uncomfortable. I have to look up a lot more on my tribike, which I wouldn't want to be on for a century. But that's no different than mountain bikes. You have to lift your head a lot more on an XC bike than a downhill bike. If it's that uncomfortable, why bother? It's not like you're doing a road race on your mountain bike.

Are you really pinching the saddle between your thighs when you descend? Someone gave me that advice when I first started riding, but I've since found that I have more control when I let the bike move underneath me. Makes it easier for me to move my body weight around too. But as I said, that goes against the advice I originally received, so maybe someone who's better at descending can weigh in.
I just tuck for the fun of the speed. I know I don't have to do it.

About the pinching, I only do that for actual rough terrain descents, with rocks and stuff. For fast and smooth descents I stay seated.
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Old 02-25-10, 01:25 PM
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I would be less apt to pinch the saddle with my butt-cheeks or whatever you guys are doing during rough/rocky descents for the purposes that Zephyr already stated. Especially on a hardtail...that thing has to be able to move around...one second I'm in front of the saddle...the next second I'm in the air with my bike sideways and the back of the saddle is resting against my left quad. Not that I'm all "tweak'master" ballin double's like a 12 y.o. anymore, but it's good to stay loose so you don't take a stump to the throat.
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Old 02-25-10, 01:38 PM
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Originally Posted by mtnbiker66
It's great to be a hillbilly.
Ya - - he said that as if there was something wrong with it .
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Old 02-25-10, 02:47 PM
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Puerto Rican hillbillies? Never woulda thunk...
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Old 02-26-10, 11:16 AM
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Originally Posted by Zephyr11
Are you really pinching the saddle between your thighs when you descend? Someone gave me that advice when I first started riding, but I've since found that I have more control when I let the bike move underneath me. Makes it easier for me to move my body weight around too. But as I said, that goes against the advice I originally received, so maybe someone who's better at descending can weigh in.
I'm just sort of discovering this stuff and developing my style, but here's what I've noticed. I used to get all the way off the back of the saddle over the tire not touching the saddle at all for descents. But, it seems like my preferred saddle position has slowly crept higher, and it's difficult for me to descend off the back of it without it interfering with my movement. I do prefer descending with the seat dropped hanging off the back of the bike where I can move around, but for the two or so short descents on my regular haunting grounds where it'd come in handy, it's not worth it to stop and drop the seat. By the time I did it, I could be two hills down the trail. So, I've started doing the pinching the saddle between my thighs thing instead. It's not as good but it works. If I lived in a mountainous area with long descents, I'd definitely get off and drop the saddle.
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