Viewing 40 posts - 1 through 40 (of 59 total)
  • How fast can you ride through corners on a roadbike without falling off?
  • yohandsome
    Member

    s

    Considering going for the KOM at the local flat 800 m tarmac track where the 180 degree corners in each end are around 250 meters. On 25 mm Conti 5000s, soon 5000 TLz.

    To get the KOM i need to average more than 55.2 km/h (looks like it was taken on an ebike but whatever), is that a safe cornering speed for such a corner? I’d need to pedal through the corners so I’m also limited by lean angle.

    This is something I don’t have a good feel for never having raced. Guess I could measure my max lean angle and as long as going over it and 45 degrees I’d be fine? (also as long as there’s no rubble on the tarmac..).

    Can someone rec a pair of aero elbow and shoulder pads?

    yohandsome
    Member

    Sheldon Brown has looked into it https://www.sheldonbrown.com/brandt/descending.html

    Says 35 degrees is about max when pedaling?

    Premier Icon TiRed
    Subscriber

    I’ve ground pedals down in races by leaning through bends and pedalling out. About 40 km/hr. But 32mph is a very fast corner. Slower if you have some straight sections, but you’ll be struggling to keep that speed for any average. You need TT aero and won’t want to corner aero at that speed!

    Premier Icon molgrips
    Subscriber

    Just wear MTB pads, keep going til you slide, get up try again.

    Re pedalling through corners, you don’t just scratch the pedals – if you’re leant over enough then pedalling will kick your back wheel up in the air which will of course cause you to instantly lose the back end. This is why I don’t pedal through fast corners any more 🙂

    yohandsome
    Member

    You need TT aero and won’t want to corner aero at that speed!

    I have the power and I’m aero enough without TT bars (CdA calculated to 0.25 in a skin suit, 1 min avg power 904 watts on a fanbike bit less on the road), but yeah, don’t want to slam into tarmac at 55 km/h as I prefer my bones unbroken.

    Maybe I should just let this one go.. cost vs benefit ratio doesn’t look very good here

    Premier Icon molgrips
    Subscriber

    don’t want to slam into tarmac at 55 km/h as I prefer my bones unbroken.

    You won’t break anything. You’ll just slide, and if you wear full MTB pads you’ll get up and be fine, seriously. This won’t be cheap mind, unless you already own a load of pads 🙂

    kerley
    Member

    Maybe I should just let this one go.. cost vs benefit ratio doesn’t look very good here

    You think.

    Cost – damages to bike, clothing, skin
    Benefit – ummm, errr, nope, nothing

    kerley
    Member

    You could also watch this

    Premier Icon joebristol
    Subscriber

    Or you could just have a go and see how far you are off the KOM without going stupid in the corners?

    Premier Icon simondbarnes
    Subscriber

    The corners are each 250m? You’ll be able to pedal flat out.

    whitestone
    Member

    The corners are each 250m? You’ll be able to pedal flat out.

    My thoughts as well. The corners on a standard athletics track are just over 100 metres for example.

    trail_rat
    Member

    Curious why you think 56kph must be an ebike.

    That’s not wild on a flat track. Even less so if they were 2 or 3 or 6 up working together- such as many KOMs are achieved these days on the road.

    yohandsome
    Member

    You could also watch this

    The GCN video on this is rubbish I did watch it: no speed, no corner angle/length and the guy just decided to fall of on purpose at the end. Plus it’s about cornering without pedaling (pedaling upsets balance a lot).

    The corners are each 250m? You’ll be able to pedal flat out.

    At least 200 meters, yes they’re long. Seems I’m not likely to slam into the ground, what’s more likely is pedal strikes and then being ejected off the track.

    yohandsome
    Member

    Curious why you think 56kph must be an ebike.

    No power, no HR, but more suspicious is that his username is “XXX with an ebike”, people have tried to flag it in the past but it still stands. Of course you could get it naturally given that the corners won’t kill ya even without and special gear or drafting.

    Premier Icon eddiebaby
    Subscriber

    Maybe a different approach?

    Premier Icon Kryton57
    Subscriber

    1 min avg power 904 watts

    No one spotted this typo?

    Premier Icon TiRed
    Subscriber

    https://www.strava.com/segments/630235

    Have a good read. A lot of bunch race times here. Nobody has gone under 2:00 in 2020 where there have been no races (yet).

    Some very fast hpv times.

    Premier Icon tjagain
    Subscriber

    I know I can corner fast enough that if I tried to pedal I would be hitting the inside pedal on the ground

    Premier Icon ads678
    Subscriber

    No one spotted this typo?

    Is it a typo, or does he actually believe that…

    trumpton
    Member

    Does body position matter as much on a road bike as on an mtb

    trail_rat
    Member

    So you believe it can be taken naturally but your worried about falling over in corners…….

    I’d be more worried about getting an asbo offf the velominati for your irregular freehub sound

    yohandsome
    Member

    No one spotted this typo?

    They are beginning to BeLiEvE, anyways i said it was on a fanbike (just pedaling)

    s

    Haven’t really gotten to try it properly on the roadbike as the only 1 minute long straightish hill around here is on the other side of town sadly, but reckon I could do 800 watts at least, have done 745w on straights.

    I’d be more worried about getting an asbo offf the velominati for your irregular freehub sound

    That’s all in the past, got the glorious Newmen Fade hub, 100% satisfied. Melted the DT350 into an aluminum block.

    jonba
    Member

    Catching pedals in crits is a problem. Our local one has a sweeping fast bend. It’s short so strava not that reliable but it suggests 70kph is possible.

    https://www.strava.com/segments/2865355

    If memory serves, dedicated crit riders, like fixie riders run short cranks to minimise the chances of this.

    They held the national TT on roads near me a few years ago. Some great segments appeared that give you an idea how fast people can ride through corners.

    https://www.strava.com/segments/18059154

    https://www.strava.com/segments/17987167?filter=overall

    The first is a cheeky chicane. And the second a simple bend. Closed roads so they could use the full width. Swept road that they will have ridden in practice but not a good surface.

    trail_rat
    Member

    Given rogue don’t have a model with a PM your data is spurious at best

    kerley
    Member

    If memory serves, dedicated crit riders, like fixie riders run short cranks to minimise the chances of this.

    Don’t start him off on that – guessing next thread title “What 140mm cranks arms are most aero”

    trail_rat
    Member

    What narrow(aero) pedal for Max lean angle on my pointless non achievements perhaps ?

    When tts restart get on it get a real measure over a proper distance and not a few hundred m

    yohandsome
    Member

    Given rogue don’t have a model with a PM your data is spurious at best

    Doubt I can put out the power eyh? See if I can borrow some powermeter pedals and we can test how close it is (anyone want to ship me some? :>, I reckon it’s fairly accurate as the echo bike is known to be the stingiest of all the fanbikes (airdyne, assbike etc) with its watts and my sub 10 second power on the road aligns well with what I can do on it.

    What narrow(aero) pedal for Max lean angle on my pointless non achievements perhaps ?

    Speedplays.

    trail_rat
    Member

    Until you fit the cleat of course

    yohandsome
    Member

    Nah, worst you’ll likely do is your shoe hitting the ground first, and if you hit the cleat it’s nice and rounded + AERO WOOT.

    d

    kerley
    Member

    When tts restart get on it get a real measure over a proper distance and not a few hundred m

    Or if only fast over a few hundred metres then get yourself to a track and do some sprint races, kilos, kierin etc,. where your short bursts of immense power will be giving you something more worthwhile that some suspect starve segments.

    You need to think about the demands of racing a fast lap. It’s not about consistent power like an indoor velodrome with banked turns. It’s more on and off power. So use your 900 watts to get you to the first corner ease off through the corner then back on as you pass the apex then repeat for all 4 corners.

    Give it a try you will learn a lot from your first few laps. Pick a dry day. Play with your tyre pressures to get them optimal. Let us know how you get on.

    Premier Icon slowoldman
    Subscriber

    I would have thought your lean angle will be dictated by the fact that you intend to keep pedalling. You won’t therefore be leaning enough to risk sliding out. Even with your aero Speedplays.

    Premier Icon TiRed
    Subscriber

    Good luck finding those pedals. They’re discontinued. I managed to find a set on eBay last year. No cleats yet. This is for the aeroz in the trike.

    You don’t need a PM. I’d it’s a closed circuit you can estimate power pretty accurately for time. And time is what you are after. I’ve done this a LOT to test equipment.

    Premier Icon molgrips
    Subscriber

    pointless non achievements

    It’s not pointless. It’s just done for the hell of it, which is the only reason we do any of our recreational biking. Some people like setting themselves arbitrary challenges – and why not?

    OP get out there and see what you can do with your bike as stock. And for the record, I also doubt your 1m power 🙂

    Premier Icon footflaps
    Subscriber

    if you’re leant over enough then pedalling will kick your back wheel up in the air which will of course cause you to instantly lose the back end.

    I’ve done this quite a few times on my commuter, rear wheel just steps out an inch or two and re-grips – scares the crap out of me, but never come off..

    yohandsome
    Member

    I also doubt your 1m power 🙂

    Going to hit the only > 1 min hill here in Berlin soon, so we shall see – 904 watts on the echo bike is not easy. Garmin connect shows 745 watts on the flats with the roadbike never having really tried for max 1 min on it, guesstimate >850 watts sprinting up a hill.

    d

    Premier Icon mogrim
    Subscriber

    So you’re putting out more power over 20s than an elite sprinter like Viviani?

    Data reveals some of the most powerful sprinters of 2018, and their numbers are pretty mind-blowing

    Not 100% convinced either tbh.

    This is highly optimistic, too:

    You won’t break anything. You’ll just slide, and if you wear full MTB pads you’ll get up and be fine, seriously.

    You hit a wall on the side of the road (or worse, slide into an armco support leg) at 55km/h and you’ll be seriously hurting. Pads or no pads.

    yohandsome
    Member

    So you’re putting out more power over 20s than an elite sprinter like Viviani?

    Ahaha love the doubters! Elite (track) sprinters have way more power than I, 1000 watts over 1 minute for sure and > 2200 watts peak.

    It’s not so hard to believe I can outpower Viviani (probably measured at the end of a 3 hr race) with fresh legs at 88 kg bw, I aim and train to get to 1000 w 1 min and 2000 w peak power. Not as ambitious with FTP, but > 300 w would be nice :> Watts/kg? Forget it.

    Premier Icon joebristol
    Subscriber

    Hang on – are any of these power figures you’re quoting with some kind of power metre or are they all on a stationary bike / out of Garmin Connect estimates?

    They all sound really really high to me but I’m no expert on the subject.

    twrch
    Member

    To get more pedalling in around the corners, you need to master the art of “wiggling” the bike a little more upright with each inside pedal stroke. This way, you are mostly leaned over more than possible while pedalling, but still have clearance for the inside pedal.

    Aero elbow and shoulder pads? You got me there. Maybe try motorcyle leathers?

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