#16
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if anything the BMC should understeer...correct me if I am wrong. How is it oversteering?
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#17
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this is how I understand it as well.. understeer
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#18
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also, stem sizing and handlebar sizing (reach, width....etc) all come into play. So unless all variables are equal, I think OP may need to dive in further to find the culprit.
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#19
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Do we agree that the thing that matters here is where the hoods end up, that handling is not affected specifically by stem length, but by whatever combo of bar reach/width and stem length chosen?
__________________
Bingham/B.Jackson/Unicoi/Habanero/Raleigh20/429C/BigDummy/S6 |
#20
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I've tested ridden a few BMC road bikes, and I personally didn't like how they handled. While they certainly tracked a straight line well, they felt unresponsive to steering inputs in quick maneuvers - in fact, it almost felt as if they were fighting back when I tried to turn the bars quickly. When testing one model of RoadMachine, it occurred to me like it handled nearly identically to my Redline cyclocross bike (whose stability is good on rough surfaces, but has ponderous handling on smooth surfaces). Afterward I compared geometries tables and found they sure enough, they had the same head angles and fork offsets, and nearly the same front center. It was commented that the BMC geometry was tweaked in response to input from Cadel Evans. Evans originally competed in mountain biking (where he won many UCI races, including the World Cup Overall title twice) before switching to road racing. Mountain bikes tend to have slacker head angles, more trail, and longer front centers than road bikes, so maybe his preferences were formed during his earlier career on mountain bikes. |
#21
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#22
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However, bicycle geometry can affect the interplay between lean angle, steering torque and turn radius, so it some cases it can feel like the rider has to apply more or less steering torque for a given turn radius and lean angle (and in some cases, may need to apply counter-torque). The steering torque for given turn radius or lean angle can vary not just with the bicycle geometry, but also weight distribution and rider technique. |
#23
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I've not ridden a BMC but I find this conversation interesting. Do BMC riders find the need for a "BMC fit"?
I ask because I had a cyclocross frame (Soma) with notably different handling than my daily driver Davidson. Trying to get the Soma as close as possible to my familiar Davidson fit didn't result in a fun ride. I only found a happy place when I experimented with a new reach/stack to suit the frame and me. |
#24
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I just adapt and quickly.. I've never found any issue with BMC and all I really care about is straightline and downhill handling. I crit race and do the usual spirited group rides. Only climbing my BMC kinda feels dead... but then again my BMC is an aero bike and not an all rounder.
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#25
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I have owned a SLR01 since 2013 and I have consistently found it to be a great handling, comfortable and streamline ride. Clean geo. In my opinion BMC is frequently overlooked, but the race geo bike hit the target right on,
Maybe because their marketing was to aggressive? Or carried by snobbish shops? Here in DC BMC was sort of found in the high end shops mostly. And not many had floor models. Who knows… Sent from my iPhone using Tapatalk Pro |
#26
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So much of our energy and attention is directed in keeping the bike upright and going straight.
A bike may feel " sluggish" but in hour 5 of a 100 mile ride you feel fresher. Not even talking about a pro who rides daily >100 miles. If I recall Joop Zoetemelk wanted his frames build with >60 mm trail in a time when steep HA were fashionable. |
#27
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That guy. Winning Worlds at the ancient age of 38! Who would want to ride like him ...
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#28
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Sounds like a high trail bike. No surprise. I have an SLC01 and I like the way it tracks and steers at speed. But I don't do much quick maneuver steering.
__________________
“A bicycle is not a sofa” -- Dario Pegoretti |
#29
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Touch points are pretty close, although not identical because I want my gravel bike to be more upright (also, descending on rough terrain often involves un-weighting the front wheel rather than maintaining a more equal weight distribution, so higher bars help push the weight farther back). However I don't think it's that important when descending, as I can control weight distribution independently of touch points, e.g. by bending elbows. If it were down to touch point differences, I would be able to see that pushing weight back or switching to hoods would resolve observed issues. Not to mention I have always had the same impression of the BMC even though I twiddled with the cockpit several times. Last edited by pff; 03-20-2024 at 12:35 PM. |
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