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Old 07-31-11, 07:30 PM   #1
AlphaDogg
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What's your top speed?

Previous to doing a 675ft climb over 3.5mi today (and then descending the hill), my top speed was 33mph. Today I hit an all new top speed of 40.8mph. What's your top speed? What kind of bike/tires/gearing/wheelset do you have that allowed you to hit your speed?

I have 38mm tires that will be replaced with 28mm tires on Tuesday. I have a cheap wheelset (no-name brand that came stock on my bike).
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Old 07-31-11, 07:57 PM   #2
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Sadly I don't remember what my top speed on my hybrid is. I think it was around 62/65 kph. I was on sun rims / dt swiss spokes / shimano hubs, 23mm Vittoria tyres, 48 / 11 gear combo. Small sweeping descent about 300m long.
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Old 07-31-11, 08:25 PM   #3
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Sadly I don't remember what my top speed on my hybrid is. I think it was around 62/65 kph. I was on sun rims / dt swiss spokes / shimano hubs, 23mm Vittoria tyres, 48 / 11 gear combo. Small sweeping descent about 300m long.
Was it controllable? I hit about 66kph (41mph) and my front end (front wheel, fork, handlebars) was wobbling back and forth. I finally regained control of it, but it was wobbling for about 500ft.
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Old 08-01-11, 06:39 AM   #4
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My best speed on my bike was 58km/h, on 700x28 Kenda Kwest tires, with Giant rims. Bike felt completely stable at that speed, but I only hit it for an instant as I was coming off of a bridge, which didn't have a very long hill down.

Can't get much faster than that in Shanghai, given that the topography here resembles a pancake.
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Old 08-01-11, 07:07 AM   #5
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I hit 43 mph this weekend. Big hill + 50/12 gearing and 700x28 tires.
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Old 08-01-11, 07:18 AM   #6
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Top speed downhill (coasting/gravity) for me so far: 74.6 kph (about 46 mph).
Top speed on flat terrain so far: 42 kph (26 mph)

The later speed is mostly because I run out of gearing - I need a bigger cog up front (only have a 42 tooth at the moment). Based on the feeling in my legs, I think I could break 50 kph with some higher gearing. When not racing or trying to give myself a heart-attack, I'm quite happy with the 25-30 kph (15-18 mph) cruising speed I get during my daily commute.
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Old 08-01-11, 08:00 AM   #7
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Was it controllable? I hit about 66kph (41mph) and my front end (front wheel, fork, handlebars) was wobbling back and forth. I finally regained control of it, but it was wobbling for about 500ft.
Yes it was very smooth. All was ok.
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Old 08-01-11, 02:05 PM   #8
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66 km/h!!! You daredevils!
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Old 08-01-11, 02:08 PM   #9
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66 km/h!!! You daredevils!
It was exhilarating. You should try it!
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Old 08-01-11, 09:29 PM   #10
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Best I've hit on my hybrid is 34 mph on a mild downhill, and about 20 mph on the flats, though that didn't last for too long before I was sucking air. I'm running 42-11 gears on Vittoria Randonneur Pros in 700x32. On the downhills, my gears aren't high enough, or I'm sure I could go faster. Nice adrenaline rush, but that nervous fear factor creeps in sometimes especially on curves.
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Old 08-01-11, 09:38 PM   #11
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Best I've hit on my hybrid is 34 mph on a mild downhill, and about 20 mph on the flats, though that didn't last for too long before I was sucking air. I'm running 42-11 gears on Vittoria Randonneur Pros in 700x32. On the downhills, my gears aren't high enough, or I'm sure I could go faster. Nice adrenaline rush, but that nervous fear factor creeps in sometimes especially on curves.
Oh yeah. I forgot about breathing. Of course, I breathed for 3 minutes on the descent, but I didn't have any trouble breathing like I would if the wind was blowing at 20mph. I forgot to mention, but I'm running 48-13 gears.
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Old 08-02-11, 03:24 AM   #12
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Dont know about my hybrid but I've done 80+ on my roadbike with Hores category wheels "very scary"
On similar downhills in the Tour Down Under riders sit on 100kph
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Old 08-02-11, 03:40 AM   #13
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39 and later that night while working on bike I noticed my rear wheel was loose, someone was looking over me.
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Old 08-02-11, 11:40 AM   #14
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Something above 40mph for downhill max speed.
About 30mph for flat max speed ... not for long though.
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Old 08-02-11, 04:07 PM   #15
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On flat ground I've hit about 28 mph sprinting, from about 21 mph starting speed.

36.6 mph on the almost-flat coming off a decent downhill.

I had water & bontraiger H2 tires both times.

Just got a new rear tire with another one on the way for next week though, so .... watch out.

My midsection is my weakest link - My legs can keep going but I can't tuck & still get enough air after sprinting for awhile. Over the bar's isn't stable on my bike at 36 mph. I must have looked insane while I tried it though.
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Old 08-02-11, 04:08 PM   #16
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Something above 40mph for downhill max speed.
About 30mph for flat max speed ... not for long though.
Ah ..ha, looks like Cancellara is pretty safe ....

Just kiddin' ya.
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Old 08-02-11, 04:17 PM   #17
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Ah ..ha, looks like Cancellara is pretty safe ....

Just kiddin' ya.
Hah. I feel sorry for him and so I let him win for now

I did a 24k TT testride yesterday and apparently it wasn't my best day.
I managed to get only 23.25mph average, including the turnaround after 12k.
I chose a course next to a canal to be sure the elevation was near zero.
The problem, on top of me not having a good day because I was recovering from the days before, was that it was the first sunny day in weeks and so the narrow path next to the canal was really crowded with cyclists ... most of them of older age and going at slow speeds, some of them in better shape and going moderately fast.
The result of this was that I had to shout "watch out" to people just about every other minute or so and had to slow down sometimes to wait for them to open a path for me.
All of this wasn't good for keeping pace, regulating breathing and concentration
I'll be on the lookout for a canal with wider paths next to it ... although I might have to drive there by car then.
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Old 08-02-11, 06:53 PM   #18
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I'll be on the lookout for a canal with wider paths next to it ... although I might have to drive there by car then.
Come to Colorado! All of the canal/creek paths in the Denver metro area have pretty wide (about 6 feet wide/2 meters wide) paths. There is plenty of room for two cyclists to ride side by side and still have room for a third cyclist to pass them.
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Old 08-03-11, 01:11 AM   #19
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Come to Colorado! All of the canal/creek paths in the Denver metro area have pretty wide (about 6 feet wide/2 meters wide) paths. There is plenty of room for two cyclists to ride side by side and still have room for a third cyclist to pass them.
Consider yourself lucky as a cyclist to live in a place where there is room for such things.
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Old 08-03-11, 08:51 AM   #20
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Hah. I feel sorry for him and so I let him win for now

I did a 24k TT testride yesterday and apparently it wasn't my best day.
I managed to get only 23.25mph average, including the turnaround after 12k.
I chose a course next to a canal to be sure the elevation was near zero.
The problem, on top of me not having a good day because I was recovering from the days before, was that it was the first sunny day in weeks and so the narrow path next to the canal was really crowded with cyclists ... most of them of older age and going at slow speeds, some of them in better shape and going moderately fast.
The result of this was that I had to shout "watch out" to people just about every other minute or so and had to slow down sometimes to wait for them to open a path for me.
All of this wasn't good for keeping pace, regulating breathing and concentration
I'll be on the lookout for a canal with wider paths next to it ... although I might have to drive there by car then.
Wow, if one tried that here, practising TT racing on the a crowded public MUP, he would either be pummelled or someone would call the cops on their cell.

As you approach 25mph the aero drag increases big time so incremental increases in speed require relatively enormous increases in sustained output. If using the aerobars and increasing speed by 2mph from say 25mph to 27mph one would need an increase in output of over 50 watts for a total of over 300 watts total. 30mph would need over 400 watts even when in the aeros. If using the bartops for one's hand position the output required for the same 27 mph would have to be over 500 watts. (725 watts for 30mph !). This is all interesting, but ultimately academic in my case, as I could not average anywhere near those speeds for any length of time over about 60 seconds, LOL.
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Old 08-03-11, 11:41 AM   #21
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Wow, if one tried that here, practising TT racing on the a crowded public MUP, he would either be pummelled or someone would call the cops on their cell.
I know I know
I won't do that again ... not fun for me nor the others.
The problem is that using roads isn't an option either since there's too much traffic being a problem.
The only really flat and straight and car-free roads I know of are the ones next to the canals, so I'll have to find one that isn't that crowded.
Next week I'm having a 24k TT race ... which is also next to a canal but between Brugge and Oostende which is too far for training purposes.
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Old 08-06-11, 08:16 PM   #22
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On flat country roads and a small hill normally about 29(mph), when I ride into the city and theres dunes (I live in Michigan) I can get up to 46(mph), I can't bring myself over 46, thats when I start hitting the brakes. I use 700x28 bontrager slick tires and stock gearing.
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Old 08-06-11, 10:04 PM   #23
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Many, many years ago I hit 56mph while on a loaded tour under perfect conditions. (6 mile downhill with a nice tailwind.) Not knowing any better, I was touring with high pressure 25mm width tires. The bike felt rock solid -no wobbles or anything. I felt perfectly safe. It took me awhile to realize why the barking dog I was hearing wasn't getting any farther away - it was in the back of a pick up traveling along at the 55 mph speed limit not too far behind me.

I've never run into conditions so perfect since and I use much wider tires on the bike I usually choose to ride. I'd say on a good downhill stretch, I might hit 40-45 if I worked at it. I could probably go faster on my road bike, but don't often find big descents when I'm riding that bike.
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Old 08-07-11, 04:37 PM   #24
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There are hills all around me...no avoiding them, but they can be used for fun. I've reached 49 MPH (78.86 KPH) on my 5500 on 2 of these hills....pedaling like a lunatic and wondering if the wheels are going to collapse and dump me into a ditch!


Sorry...just realized this is the hybrid forum...my bad!
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Old 08-07-11, 05:40 PM   #25
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Sorry...just realized this is the hybrid forum...my bad!
No worries. This thread wasn't really directed towards just hybrids, but rather it is directed towards any bike. I take it that a 5500 is a roadie?
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