Simon joined road.cc as news editor in 2009 and is now the site’s community editor, acting as a link between the team producing the content and our readers. A law and languages graduate, published translator and former retail analyst, he has reported on issues as diverse as cycling-related court cases, anti-doping investigations, the latest developments in the bike industry and the sport’s biggest races. Now back in London full-time after 15 years living in Oxford and Cambridge, he loves cycling along the Thames but misses having his former riding buddy, Elodie the miniature schnauzer, in the basket in front of him.
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Is it worth it though? Even for a pro, I'd say no. The people who risk everything to get a Strava KOM make me laugh, you do realize it means absolutely fuck all, right? But you could go off the side of that mountain fairly easily.
Fastest for me has been 53 mph coming down the Coll De Feminia in Mallorca. I'd already descended it a few times so I knew how to take the bends without scrubbing too much speed off. As mentioned by others already, on smooth continental roads it doesn't feel half as fast or dangerous as it would here in the UK.
There's a hill near me that's pretty steep and fairly straight, which I've hit 45mph on. I've been down it loads of times, raced people down it, all sorts. Last week I went down it with some heavy crosswinds, not even trying to go fast, and started wobbling everywhere, thought I was going to come off, terrifying.
There's a cat 3 near us with an arrow straight section of about a hundred metres at about 15%. I struggle to go too fast down there as there's a >90 degree bend at the top, but a motorcyclist who used to ride a bike with us hit mid 50s going down there and left us for dust.
GPS speed can indeed be unreliable, but a speed sensor on the rear wheel sorts that out - and means you can use Zwift without shelling out for a power meter.
GPS speed can go a bit wibbly, but it's generally obvious from looking at the Strava data. My Garmin clocked me at 452mph (sunglasses advised at anything over 400mph) exiting a tunnel on the D1091 between the Col du Lauteret and Bourg d'Oisans. Realistic speeds I've seen are more in th 50mph range for a cautious person like me.
I'd believe that speed though for a pro descending on closed roads with good tarmac. But yeah, squeaky bum time.
I thought cycling was the new golf, not the new fishing...
Suggest a quick browse over to fish.shimano.com
I've hit the magical tonne a few times (or is it ton in metric) and rarely thought that much about it, it's much scarier for me to be chugging along in a chaingang at 40kph staring at someones arse 5cm from his back wheel!
I'm not a roadie by nature I came about it as a method to train for XC riding so I'm not sure if the extra skills a MTBer has help in descending, for instance I've had a road bike drifting and I've brought it back, or perhaps it's confidence.
I'd certainly advocate a multi disciplined approach to riding as all the various skills you learn all compliment each other.
I hit 100 kph coming off Ventoux towards Malaucene, then I got the dreaded front wheel wobble.
I thought I was going to die.
I gripped the top tube with my knees loosened my grip on the bars and brought the speed back down to 60kph.
It was then that my rear derailleur sheared from the frame and was pulled into the back wheel locking it tight.
The last thing I remember was my back tyre blowing due to the flat spotting.
French hospitals are very good.
I bet it's the same place I had my worst ever speed shimmy and the same place Guy Martin crashed his go cart.
Luckily my shimmy disappeared when I unclipped one foot, couldn't grip the top tube on my compact frame. Nothing else worked
Bye bye Litespeed Mira
76kph over a cattle grid in drizzly weather on the dragon ride the other day (coming down from Rhigos). I've been faster but that was definitely the scariest.
This would be an appropriate thread to post the picture of my grazed knee when I came off just after hitting around 54 mph on the Dartmoor Classic a couple of years ago. I have now taken Current Speed and Max Speed off my Garmin display so I don't try for those kinds of speeds any more...
I had some serious shimmy once upon a time on a descent, and given that I don't take part in any races, tend to just 'take it easy', and not push the limits on descents. Even if the bike is stable, and you know the road, there are always the unexpecteds like wind gust, gravel, potholes, animals crossing, vehicles pulling out, etc.
There's a descent off Cairn O' Mount near where I live in Aberdeenshire which is pretty fast. I think the fastest guys on Strava touch 100kph. My fastest there (and anywhere) is 89.6kph open roads. That was on my gravel bike, which feels more stable at those kind of speeds than my road bike.
I'm impressed! Weight really helps for speed, helping e.g. Thor Hushovd to descend like a mad thing, but Kevin Reza is only 11st 4lb. I'd love to know what position he used...
I once saw 109kph / 67mph descending the Agnes into Aulus in the Ariege, but was *really* trying. Speed was accurate as on a magnet driven sensor which I calibrated after for wheel size. The Icing on the cake was the motorist overtaking afterwards shouting 'Allez Pantani!'
Definitely the only time someone has compared me to him!
Female, 9st 7lb.
I can never tell if a driver is giving you shot or cheering you on as they go past (when a cycling event is going on).
I've had 64mph (103-ish kph) on a descent in the Alps and there were French cyclists coming past me. They'd sit up and aerobrake into the corners, whip round them then straight back down into tuck. They did know the descent better than I did though!
Car drivers just get out your way over there was well, it was ace
Mid-high 50's mph was standard in Spain as well where the huge wide roads and pristine surfacing make those sort of speeds feel far safer than mid 40's on shit UK roads. I did try for a personal speed record last time I was out in Spain on a road I know well but the wind was in the worng direction for the whole time I was out there.
Simplon Pass, closed road, tailwind, 135kph would be fairly easy. I remember Cav once posted a similar picture showing him at about 128kph, I think from that same descent.
This.
I don't think I've ever been faster than mid-40s in the UK and have been bricking it; mid-50s a few times in Spain and Mallorca and felt much more comfortable.
I once hit 58.9mph on a local descent... never went back to see if I could get the extra 1.1mph.
It was terrifying. Couldn't beleive the difference in perceived speed between say 55mph and 60mph.
Would not like to think about 80mph.
The fastest I have hit is 73kph on closed roads. I wasn't exactly scared, but was having existential issues thinking about what would happen if I did have a crash.
The fastest segment I've done on open road is 63 one of my favourite training routes and I was a couple seconds away from a rare descending KOM, sitting in 3rd place. Then last year I was watching ToB, thinking 'ooh they are doing the Brickworks climb in Cheshire... wait what way are they turning...?' I dropped to 56th overnight. Still, 2 seconds behind Ian Stannard and Kristian House on a segment is good company.
I imagine you mean mph or have a number wrong - I only say this beacause my fastest time is 73kph on open roads, and I'm a bit rubbish.
73 kph is still bloody fast. 73 mph would be rare in the pro peloton, extremely rare outside it
Bear in mind that the people posting top speeds of 90/100 kph are the exception rather than the rule.
I've been road cycling several years and have only fractionally exceeded 80kph/50mph on a handful of occasions.
Ignore GPS spikes too, it needs to show a build up to the peak and back down for several seconds either side to be sure it's accurate.
No mistake, kph. I could go faster if I wanted to hurt myself. It is quite easy to go beyond your skill level, just find a hill big enough. The 63kph, was a pushing down 5%. There seems to be a big difference to handling if you are actually pedalling than if you ae just holding on and letting gravity do its work.
[/quote] 73 kph is still bloody fast. 73 mph would be rare in the pro peloton, extremely rare outside it Bear in mind that the people posting top speeds of 90/100 kph are the exception rather than the rule. I've been road cycling several years and have only fractionally exceeded 80kph/50mph on a handful of occasions. Ignore GPS spikes too, it needs to show a build up to the peak and back down for several seconds either side to be sure it's accurate.[/quote]
I'm sorry, hitting 90 kph is nothing unusual. I have a 14% straight stretch that I regularly pass 80 kph on and that's just on my main beat. As mentioned elsewhere I regularly go high 90's on Ngauranga gorge, and I'm not the fastest strava down there. You know you're doing 90's because the speed limit is 80 kph and you're passing everything.
I think as much as anything this might be terrain dependent, as I've searched far and wide and a'not pedalling' 100kph descent doesn't exist any where within a 4 hour ride of my place. I lived in for a time Forest Row and there's a 14% hill there that 90 kph was very easy on. 100 kph was less so due to the exceedingly uneven surface.
I agree 73mph outside of the pro peloton is unusual (I've not met any amateur with a top speed higher than my 122) but it's 'relatively' common in the pro peloton, as in I know a lot of pros, and all of them would have touched 120+.
Point is, 90-100kph may be fast to non- racers, but really, it is a relatively common speed. I draft trucks and regularly hit 90 on the flat. Down a hill it's really not exceptional. 135 is though
After putting Live Segments on my strava (yeah I went there) it told me my virtual partner had finished a mile segment when I was about 600m in. I felt slightly better when finding it was pacing me against Stannard as the KOM on ToB...
On a decent surface, good body position, good tyres and the right slope north of 70 mph is entirely possible.
Mid 50s is fastest for me, first done in 1990, don't like climbing so not too many opportunities to go faster. Some lower grade twisty alpine stuff was fun for me and tunnels you enter at speed and cant see shit with the piss weak sodiums.
The A505 d/c out of luton eastwards is a laugh at around 50 when the HGVs are only just able to get past.
What isn't is getting a full on tank slapper at mid 40s as you've hit two uneven bumps one after another due to shit road dressing.very unpleasant!
Seeing how my gps "speed" indication jumps around when I am going at a steady speed makes me think that any one speed such as on the screen capture may be wildly out.
I am not saying that these speeds are not reached, they might just as likely be higher than lower but I really take them with a pinch of salt.
Yeah, I see this quite frequently, I may have missed a segment PR the other week because GPS device thought I had teleported about a quarter of a mile and back again... I was actually pushing along at about 30mph on a road I used to genuinely hold the KOM on by quite a margin. It was so far off that it didn't think I had done the 3km segment. I knew something wasn't right at the time because it was reading about 50mph for a bit and then zero.
Top speed is far more likely to be over-calculated, as it compensates for any under-reading, unless you rapidly slow down while it's lagging it should always overcompensate for the lab.
I wonder what the tyre manufacturers think when they hear about this sort of speed on their products....
The speed rating on car tyres is related to their ability to withstand heat without material failure. Bicycle tyres heat up a little but to nowhere near the same extent as car tyres, therefore they don't need to be speed rated.
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