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difference between jammers and normal aerobars
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 2007-09-26 11:35 AM |
Master  2629     brummie land |  Subject: difference between jammers and normal aerobarshow does the size difference affect the handling on a road bike? about to lay down some ££ and want to make the correct choice of aerobars. help!!!
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are the one choice i have been priced for. my mechanic has these on his roadbike. | 2007-09-27 6:00 AM in reply to: #979857 |
Master 1810 Morse Lake, Noblesville, Indiana | Subject: RE: difference between jammers and normal aerobars As a roadbike as a smaller seat angle, you are sitting further back. If you use a longer tri bike aerobar, you will be severly stretched out - jammers are shorter to rectify this fact. As an alternative, you can get a forward seat post, which will mimic the seat angle of a tri bike, and may allow you to have longer tri bars, but there may be a couple of issues with this, such as weight bias on the front wheel, as well as it may just not be as comfortable. If you are on a road bike, you may not ever really get the aero benefits that a tri bike has, your roadbike just may not be able to get you that "FIST" approved geometry - just think of the aerobars as a comfort thing, allowing you yet another position for your hands. |
| 2007-09-27 4:48 PM in reply to: #979857 |
Master 2629 brummie land | Subject: RE: difference between jammers and normal aerobars not bothered about any geomtery. just a going a wee bit faster. Edited by sappho96 2007-09-27 4:48 PM |
| 2007-09-27 5:12 PM in reply to: #982022 |
Master 1810 Morse Lake, Noblesville, Indiana | Subject: RE: difference between jammers and normal aerobars sappho96 - 2007-09-27 5:48 PM not bothered about any geomtery. just a going a wee bit faster. It's all about the geometry. Without that, your best bet is to just ride more - aerobars in themselves will not make you faster. "Aero" IS the geometry. Edited by tjtryon 2007-09-27 5:20 PM |
| 2007-09-27 5:24 PM in reply to: #982046 |
Master 2629 brummie land | Subject: RE: difference between jammers and normal aerobars yeh but what i thought was that by having the aerobars in whatever form they made you more aero and hence faster? i KNOW its mainly about the engine, but are they worth the ££? |
| 2007-09-27 5:38 PM in reply to: #982063 |
Master 1810 Morse Lake, Noblesville, Indiana | Subject: RE: difference between jammers and normal aerobars Nope. On a road bike you _MAY_ get more "aerodynamic", but very doubtfully enough to make any more speed. Where you will see the benefit, it will give you an additional hand position for longer rides. On a triathlon bike, aerobars will position your body low enough (alot lower than on a road bike with aerobars) to provide you with an aero benefit. |
| 2007-09-27 5:48 PM in reply to: #982088 |
Master 2629 brummie land | Subject: RE: difference between jammers and normal aerobars thanks. so best off sticking with learning to ride in the drops more? then again an extra hand position would be nice...
thanks for the replies |
| 2007-09-27 7:29 PM in reply to: #979857 |
| Veteran 135 Mesa, az | Subject: RE: difference between jammers and normal aerobars My average speed rises about 1.5 mph with my aerobars on my roadbike. If you look at front on profiles the aerobars do indeed reduce your wind profile. Not a whole lot more than the drops, but a heck of a lot more comfortable over distances. Edited by pauldelamancha 2007-09-27 7:31 PM |
| 2007-09-27 7:40 PM in reply to: #982183 |
Master 1810 Morse Lake, Noblesville, Indiana | Subject: RE: difference between jammers and normal aerobars pauldelamancha - 2007-09-27 8:29 PM My average speed rises about 1.5 mph with my aerobars on my roadbike. If you look at front on profiles the aerobars do indeed reduce your wind profile. Not a whole lot more than the drops, but a heck of a lot more comfortable over distances. I'm guessing your speed would be simmilar to riding in the drops. You are right, they are much more comfortable than the drops over long distance. |
| 2007-09-27 8:35 PM in reply to: #979857 |
Master 2946 Centennial, CO | Subject: RE: difference between jammers and normal aerobars Just want to chime in here. I've talked about this before. On a road bike you probably want to go with Jammers. The idea is that the your elbows will rest behind the handlebars rather than on top or in front like what you have with aerobars. The reason for this is two fold. One your seat post angle and top tub put you back further and you don't want to be so stretched out (1. Compress your diaphram limiting O2 uptake, 2. if your streched out to far will actuallly decrease power.) . Two and more important you will be more stable centering your weight just behind the bars rather than in front of it. Get the Jammers. |
| 2007-09-29 12:25 PM in reply to: #982234 |
Master 2406 Bellevue, WA | Subject: RE: difference between jammers and normal aerobars velocomp - 2007-09-27 6:35 PM Just want to chime in here. I've talked about this before. On a road bike you probably want to go with Jammers. The idea is that the your elbows will rest behind the handlebars rather than on top or in front like what you have with aerobars. The reason for this is two fold. One your seat post angle and top tub put you back further and you don't want to be so stretched out (1. Compress your diaphram limiting O2 uptake, 2. if your streched out to far will actuallly decrease power.) . Two and more important you will be more stable centering your weight just behind the bars rather than in front of it. Get the Jammers. X2 I added a long one-piece aluminum aerobar with flip up armrests once, and my road bike became twitchy as all heck. They screwed up the front end balance something awful, I think because of the weight and leverage. And I was stretched out too far in the aero position to be comfortable, and the handling was wonky. I eBaYed those and went with really short jammers, the kind where you rest your forearms on the bar tops with Velcro wraparound pads. Oops. Opposite extreme. No twitchiness, but way too much leverage on my forearms to be comfortable in the aero position. EBay to the rescue again. Now my road bike has Profile Design CGT aerobars. Carbon, short, elbow pads. Ahh. No twitchiness, not stretched out too far, handling in the aero position feels normal, and I can still use the bar tops well enough for hill climbing. Edited by brucemorgan 2007-09-29 12:26 PM |
| 2007-10-01 2:34 AM in reply to: #979857 |
Pro 5892 , New Hampshire | Subject: RE: difference between jammers and normal aerobars Jammers are specifically designed to be used on road bikes with a typical road weight distribution. Thus the shorter design placing. "Regular" aerobars are designed to be ridden on bikes designed for a more forward weight distribution (such as Tri bikes or TT bikes). You should be concerned about geometry. The clear majority of your energy is being used overcoming the aerodynamic properties of your body position. A poor geometry for YOU may not only slow you down, but also prohibit you from using your energy efficiently over a longer distance. Rule #1 should always be, tune you body position first, then you a bike. Not the other way around. |
| 2007-10-01 8:52 AM in reply to: #979857 |
| Wilmington, Delaware | Subject: RE: difference between jammers and normal aerobars I'm also looking into installing some aero bars on my road bike and am concerned about the handling if I'm too far forward. I'm leaning towards getting the PD Air Stryke model as it has flip up pads. I do most of my riding on the top bars and don't want the aerobars to interfere with my hand grip. Anyone have any thoughts on the Air Stryke v. the Jammer model? |
| 2007-10-01 9:28 AM in reply to: #985130 |
Master 2406 Bellevue, WA | Subject: RE: difference between jammers and normal aerobars Esquiredo - 2007-10-01 6:52 AM I'm also looking into installing some aero bars on my road bike and am concerned about the handling if I'm too far forward. I'm leaning towards getting the PD Air Stryke model as it has flip up pads. I do most of my riding on the top bars and don't want the aerobars to interfere with my hand grip. Anyone have any thoughts on the Air Stryke v. the Jammer model? Yeah. The aluminum Air Stryke is the model I originally had on my road bike. As I said in my earlier post, I didn't like it for several reasons and ended up selling it. And BTW, I didn't like the flip up pads either - they were hard to get into quickly. I even rubber-banded them down for a sprint tri once, so I wouldn't have to deal with them during the race. The CGT that I have now has non-flip-up elbow pads, but I still can use some of the tops of the bars. It's a good enough compromise. |
| 2007-10-01 11:15 AM in reply to: #979857 |
Master 1810 Morse Lake, Noblesville, Indiana | Subject: RE: difference between jammers and normal aerobars On my roadbike, I have PD Aerolites, very adjustable, works well with road geometry, though I do loose some of the bar tops. |
| 2007-10-01 12:26 PM in reply to: #979857 |
Master 1472 | Subject: RE: difference between jammers and normal aerobars Profile Design Jammer GT for me and I cant imagine anything better for me. Never tried anything else but I am stabel and comfortable so why would I change. Also, I do not find that the armrest interferes at all with the top hand position when climbing. |
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