What are some of the fastest folding bikes?
09-30-18, 09:39 PM
#101
Full Member
Xootr swift.
Moulton
Bike Friday pocket rocket
Airnamal chameleon
dahon smoothhound
Dahon and tern second tier in speed due to frame design
Brompton third tier. Great fold, just better for pootling about.
Citizen and others later
Moulton
Bike Friday pocket rocket
Airnamal chameleon
dahon smoothhound
Dahon and tern second tier in speed due to frame design
Brompton third tier. Great fold, just better for pootling about.
Citizen and others later
04-02-24, 06:46 AM
#102
Junior Member
Tern 2nd tier. The X18/X20 and especially the X30/X11 will smoke any wannabee for acceleration and speed. I've hit 30.1mph on my X11. And im 60 years old and weight 92kg.
04-02-24, 08:14 AM
#103
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Bikes: Dahon Jetstream p8 (sold), customized Dahon Helios x10, customzed Dahon Smooth Hound x11,customized Dahon Hammerhead 8.0 d7, Planet X Free Ranger (mullet setup 1x11), Planet X Giovanissimi 20 (1x9), Frog 52 (1x9) and Frog 48 1s
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In theory, a tern x11 with 52T chainring and 10T cog on 28-451 tyres is geared at 30mph @97rpm and that is without taking into account wind resistance and rolling resistance.
I had a bit of a play today during the training session, my smooth hound (7.5kg) with 69T chainring and 11T cog on 35-406 tyres is geared for 30mph@85rpm or 34mph@97rpm.
Yet, on a TT segment today, with this ratio between 450 and 500 W and 85rpm, I recorded 24.6mph because of wind and rolling resistances so ~85% of isolated theory.
I did again on a later between 88 and 90 rpm and I go 29mph so 92%.
So if we consider 10% loss due to various resistance looses, your isolated speed would have to be 33.3mph which 107/108 rpm on 52/10 ratio. That is required serious fitness, similar to CRIT racers...
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04-02-24, 10:11 AM
#104
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100% the fastest bike I own round town: the Swytch electric front wheel conversion pulls to 20 mph / 32kph and it’s utterly hilarious to ride, if slightly terrifying.
04-02-24, 11:10 AM
#105
Junior Member
04-02-24, 11:33 AM
#106
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04-02-24, 12:51 PM
#107
Junior Member
Thanks! For a moment i thought it's one of those builds where the battery is spread all over the bike where is space for those 18650 cells.
04-02-24, 01:41 PM
#108
Junior Member
on flat??? How did you record that?
In theory, a tern x11 with 52T chainring and 10T cog on 28-451 tyres is geared at 30mph @97rpm and that is without taking into account wind resistance and rolling resistance.
I had a bit of a play today during the training session, my smooth hound (7.5kg) with 69T chainring and 11T cog on 35-406 tyres is geared for 30mph@85rpm or 34mph@97rpm.
Yet, on a TT segment today, with this ratio between 450 and 500 W and 85rpm, I recorded 24.6mph because of wind and rolling resistances so ~85% of isolated theory.
I did again on a later between 88 and 90 rpm and I go 29mph so 92%.
So if we consider 10% loss due to various resistance looses, your isolated speed would have to be 33.3mph which 107/108 rpm on 52/10 ratio. That is required serious fitness, similar to CRIT racers...
In theory, a tern x11 with 52T chainring and 10T cog on 28-451 tyres is geared at 30mph @97rpm and that is without taking into account wind resistance and rolling resistance.
I had a bit of a play today during the training session, my smooth hound (7.5kg) with 69T chainring and 11T cog on 35-406 tyres is geared for 30mph@85rpm or 34mph@97rpm.
Yet, on a TT segment today, with this ratio between 450 and 500 W and 85rpm, I recorded 24.6mph because of wind and rolling resistances so ~85% of isolated theory.
I did again on a later between 88 and 90 rpm and I go 29mph so 92%.
So if we consider 10% loss due to various resistance looses, your isolated speed would have to be 33.3mph which 107/108 rpm on 52/10 ratio. That is required serious fitness, similar to CRIT racers...
Last edited by Sentinel1; 04-02-24 at 01:46 PM.
04-02-24, 02:11 PM
#109
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I agree 100% as I said I am 60 and weigh nearly 200lbs. A super fit pro cyclist would easily hit 35mph. Especially on the X30 and X18 with are closer to road bike gear inches. I broke 30mph in favourable conditions. Back wind and very even hard pack road. I was 56 at the time. Best I can do now is about 27mph. That's still pretty good for my age and the limitations of a folding bike. The X30 can live with a road bike alot better. With its lightning acceleration and 121 inch top end gearing. But you have to assume the roadie hunched over posture. My friend who owns one weighs 167lbs. And has hit 34mph on the X30H.
since last week, i keep reading the apologia of the tern verg x18/x20/x11 etc. but a lot of it is not accurate and not substantiated. Just a vast amount of poppy cock.
if you did 30mph on flat on a verge and still do 27mph, then you should be an elite rider…
04-02-24, 03:08 PM
#110
Junior Member
i know people who race in crit and are super fit and capable to produce ftps over 350w and yet, on Swork or pinarello race bike and yet, on flat in summer without wind, they do 32 to 36mph. Again this is on race specific bike and you think this in achievable on a 20” folding bike with a up right position…
since last week, i keep reading the apologia of the tern verg x18/x20/x11 etc. but a lot of it is not accurate and not substantiated. Just a vast amount of poppy cock.
if you did 30mph on flat on a verge and still do 27mph, then you should be an elite rider…
since last week, i keep reading the apologia of the tern verg x18/x20/x11 etc. but a lot of it is not accurate and not substantiated. Just a vast amount of poppy cock.
if you did 30mph on flat on a verge and still do 27mph, then you should be an elite rider…
04-03-24, 01:09 AM
#111
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i know people who race in crit and are super fit and capable to produce ftps over 350w and yet, on Swork or pinarello race bike and yet, on flat in summer without wind, they do 32 to 36mph. Again this is on race specific bike and you think this is achievable on a 20” folding bike with a up right position…
since last week, i keep reading the apologia of the tern verg x18/x20/x11 etc. but a lot of it is not accurate and not substantiated. Just a vast amount of poppy cock.
if you did 30mph on flat on a verge and still do 27mph, then you should be an elite rider…
since last week, i keep reading the apologia of the tern verg x18/x20/x11 etc. but a lot of it is not accurate and not substantiated. Just a vast amount of poppy cock.
if you did 30mph on flat on a verge and still do 27mph, then you should be an elite rider…
Not at all. That was peak time. An elite cyclist would be able to hold those speeds for a while. I simply peaked at those numbers for a few seconds.
Your Honor, I rest my case…
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04-04-24, 09:03 AM
#112
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Wow, this post is a real 'blast from the past'. I hope those contributors who no longer post here are doing well.
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