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Old 06-14-10, 02:23 PM   #1
xoxoxoxoLive
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New personal record for me. 53.4 MPH downhill..(Question)

That was a new record for me, return trip up the same hill, average speed 2.5 (PUSHING)
I have a 2 mile stretch of road that has a very small incline, have no clue of percent, but very small. Going up I average between 9 to 12 MPH, and returning 17 to 20 MPH. Now those speeds are not trying for my best, but comfortable to me, I,m sure I could manage 17 to 20
MPH up and 20 to 25 MPH back. Question: What is the fastest you have been down hill, and
average ride speeds. My average looks horrible, ( 8.4 MPH ) but I spend a lot of time off road
and pushing these hills around here.. Richard
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Old 06-14-10, 02:34 PM   #2
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you got that computer set correctly?
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Old 06-14-10, 02:39 PM   #3
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53,4 m/h? that sounds like a lot!
If you did 53,4 m/h on a "very small incline" (as you say) then that would be too incredible to be possible, no?
Going 17 to 20 m/h uphill already sounds like a lot to me, too.
Not trying to offend you as you might just be out of my league, but are you sure your speedometer is correctly adjusted there?
My averages are about 18,5 m/h overal ... let's say about 14 m/h uphill on normal hills and 30+ m/h on descents ... this for 10 to 20 mile rides only though. The fastest I ever went downhill yet was a bit less than 50 m/h and that was going down a pretty steep hill.
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Old 06-14-10, 02:41 PM   #4
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Originally Posted by xoxoxoxoLive View Post
That was a new record for me, return trip up the same hill, average speed 2.5 (PUSHING)
I have a 2 mile stretch of road that has a very small incline, have no clue of percent, but very small. Going up I average between 9 to 12 MPH, and returning 17 to 20 MPH. Now those speeds are not trying for my best, but comfortable to me, I,m sure I could manage 17 to 20
MPH up and 20 to 25 MPH back. Question: What is the fastest you have been down hill, and
average ride speeds. My average looks horrible, ( 8.4 MPH ) but I spend a lot of time off road
and pushing these hills around here.. Richard
Also my top pedaling speed seems to be around 30 MPH, I have a 48 tooth gear in the front and a 13 in the rear, does this sound about right?
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Old 06-14-10, 02:44 PM   #5
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53,4 m/h? that sounds like a lot!
If you did 53,4 m/h on a "very small incline" (as you say) then that would be too incredible to be possible, no?
Going 17 to 20 m/h uphill already sounds like a lot to me, too.
Not trying to offend you as you might just be out of my league, but are you sure your speedometer is correctly adjusted there?
My averages are about 18,5 m/h overal ... let's say about 14 m/h uphill on normal hills and 30+ m/h on descents ... this for 10 to 20 mile rides only though. The fastest I ever went downhill yet was a bit less than 50 m/h and that was going down a pretty steep hill.
That was coasting down a very steep hill, my average is way under yours, maybe I worded my post wrong..
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Old 06-14-10, 02:47 PM   #6
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Originally Posted by xoxoxoxoLive View Post
Also my top pedaling speed seems to be around 30 MPH, I have a 48 tooth gear in the front and a 13 in the rear, does this sound about right?
What kind of bike? What size are the wheels and tires? What's your cadence? How long are you keeping at 30 mph?
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Old 06-14-10, 02:51 PM   #7
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you got that computer set correctly?
computer on bike is right, just posted it wrong, coasting down a very very steep hill 53.4, pushing same hill
back up 2.5 MPH. then I started another topic on a very small hill, you really can not even call it a hill, is where
the other numbers come from, I should have separated the two stories better..On a rode ride I do good to average 12 MPH.....just worded it wrong, sorry. Richard
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Old 06-14-10, 02:53 PM   #8
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Just worded it wrong, sorry

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Originally Posted by rumrunn6 View Post
you got that computer set correctly?
computer on bike is right, just posted it wrong, coasting down a very very steep hill 53.4, pushing same hill
back up 2.5 MPH. then I started another topic on a very small hill, you really can not even call it a hill, is where
the other numbers come from, I should have separated the two stories better..On a road ride I do good to average 12 MPH.....just worded it wrong, sorry. Richard
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Old 06-14-10, 02:55 PM   #9
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Also my top pedaling speed seems to be around 30 MPH, I have a 48 tooth gear in the front and a 13 in the rear, does this sound about right?
I assume that by "top pedaling speed" you mean top speed on a flat road, right?
It all depends on just how flat or slowly descending or ascending this road is and especially the direction of the wind.
I have a 52 tooth gear in the front and an 11 in the rear ... I'm 30 years old and in good condition (apart from a bad back) ... I don't know you or the shape you are in but 30 m/h on a flat road sounds like a lot.
Have you tried calibrating your speedometer by using your car?
I did: I rode my car from my driveway to Geraardsbergen, which is a town nearby and measured the distance to the line of the traffic lights there ... it apeared to be exactly 10 kilometers (I did aim for a round number but it came in as 10,0 ... which was funny).
Then I rode my bike by the exact same path and it appeared that my speedometer was about 6% off ... a simple calculation and some adjustments gave me a perfectly calibrated speedometer
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Old 06-14-10, 02:59 PM   #10
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Originally Posted by xoxoxoxoLive View Post
computer on bike is right, just posted it wrong, coasting down a very very steep hill 53.4, pushing same hill
back up 2.5 MPH. then I started another topic on a very small hill, you really can not even call it a hill, is where
the other numbers come from, I should have separated the two stories better..On a rode ride I do good to average 12 MPH.....just worded it wrong, sorry. Richard
I see
That explains a lot indeed.
53,4 m/h is a nice record then congrats!
Last time I tried for topspeed downhill I had a serious headwind and only managed about 40
I haven't tested my new racewheels downhill yet ... I'm waiting for a day with better weather and less wind ... if I beat your 53 i'll let you know
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Old 06-14-10, 03:00 PM   #11
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What kind of bike? What size are the wheels and tires? What's your cadence? How long are you keeping at 30 mph?
700 x 38c and can not maintain that for very long, cadence was as fast as I could pedal, LOL going down hill..
Richard
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Old 06-14-10, 03:11 PM   #12
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I tried to put to much in one post....stories getting mixed up... sorry

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What kind of bike? What size are the wheels and tires? What's your cadence? How long are you keeping at 30 mph?
700 x 38c and can not maintain that for very long, cadence was as fast as I could pedal, LOL going down hill.. I really like long bike rides at around 10 MPH, then maybe lock my bike to a tree
and then go hiking another 5 miles or so....I may be gone from home for 5 hours or more...I'm
not a very fast rider, and when I said up hill, at 9 to 12 MPH, you really could not even call that a hill.....bad post on my part.. Richard
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Old 06-14-10, 03:22 PM   #13
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Congrats on your new personal best!

I donít know what my fastest on a bike but on rollerblades, top speed was 44 MPH doing A2A (87 miles from Athens to Atlanta). There is one mile of downhill and every year police stands at the bottom with a radar gun clocking us. That road speed limit was 25 MPH till police started to clock us, it is now 45 MPH.
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Old 06-14-10, 03:49 PM   #14
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44 m/h on roller blades?? damn.
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Old 06-14-10, 03:52 PM   #15
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Thats incredible !

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Congrats on your new personal best!

I donít know what my fastest on a bike but on rollerblades, top speed was 44 MPH doing A2A (87 miles from Athens to Atlanta). There is one mile of downhill and every year police stands at the bottom with a radar gun clocking us. That road speed limit was 25 MPH till police started to clock us, it is now 45 MPH.
My personal best was just over 40 MPH, till today. The speed limit on the road was 45
but cars due 60 plus all the time..Maybe they will change the limit. I was a little scared
on my bike, but rollarblades....thats crazy fast !!! Richard
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Old 06-14-10, 11:16 PM   #16
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I have hit 45mph and past that I didn't look at the speedometer, pretty sure I hit 50 though. That was coasting, NO pedal input at all, on a knobby tired mountain bike (26").

In all fairness, to get up that same hill I was in granny gear most of the way: 22x34! Spinning like crazy but made it. I couldn't do that anymore, my heart would probably explode! That was on-road. Off-road I have hit maybe 30 and it was rather exciting...again, granny gear to get back up, because I just had to do it again

For some reason I still feel safer at high speeds on a mountain bike. Something about fat tires to suck up bumps...
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Old 06-15-10, 12:15 AM   #17
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44 m/h on roller blades?? damn.
It was one of the most exhilarating thing I have ever done. It was also one of the scariest. Flying down that hill in total concentration, eyes wide open, searching for every little bump, gravel and tree branches. At times, we stand up with arms wide open to slow down, towards the bottom of the hill, our eyes are tearing even with sunglasses on. I did that event twice, I wish I can do it again but 86 miles of uphill and 1 mile descent is just too much punishment for this tired, old and out of shape body.

http://a2a.net/

http://www.youtube.com/watch?v=N0RQF...layer_embedded
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Old 06-15-10, 01:15 AM   #18
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Nice Video !

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It was one of the most exhilarating thing I have ever done. It was also one of the scariest. Flying down that hill in total concentration, eyes wide open, searching for every little bump, gravel and tree branches. At times, we stand up with arms wide open to slow down, towards the bottom of the hill, our eyes are tearing even with sunglasses on. I did that event twice, I wish I can do it again but 86 miles of uphill and 1 mile descent is just too much punishment for this tired, old and out of shape body.

http://a2a.net/

http://www.youtube.com/watch?v=N0RQF...layer_embedded
I miss my youth years I'm closing in on 47, but my brain still thinks it is 25 ,
Aderlaar you beat 53 MPH and the beers on me...The hill is about one mile long, and steep, I have rode up it ONCE, in 1 and 1 gear..spinning like crazy ! but felt like superman when I got to the top !! Skating down that hill, CRAZY ! Love the song to...Richard
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Old 06-15-10, 01:36 AM   #19
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Me too...

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I have hit 45mph and past that I didn't look at the speedometer, pretty sure I hit 50 though. That was coasting, NO pedal input at all, on a knobby tired mountain bike (26").

In all fairness, to get up that same hill I was in granny gear most of the way: 22x34! Spinning like crazy but made it. I couldn't do that anymore, my heart would probably explode! That was on-road. Off-road I have hit maybe 30 and it was rather exciting...again, granny gear to get back up, because I just had to do it again

For some reason I still feel safer at high speeds on a mountain bike. Something about fat tires to suck up bumps...

There was NO pedaling ! My bike only goes about 30 MPH pedaling...I to have made it up the hill ONCE...Tried about 4 times, though ...When I did make it up, average speed, same as pushing it up..( LAUGH ) 2.5 MPH
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Old 06-15-10, 01:43 AM   #20
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I miss my youth years I'm closing in on 47, but my brain still thinks it is 25 ,
Aderlaar you beat 53 MPH and the beers on me...The hill is about one mile long, and steep, I have rode up it ONCE, in 1 and 1 gear..spinning like crazy ! but felt like superman when I got to the top !! Skating down that hill, CRAZY ! Love the song to...Richard
47? *faint* dayam you are one old dude! We have a major generation gap! I will turn 46 in Oct.
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Old 06-15-10, 02:19 AM   #21
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I know ! !

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47? *faint* dayam you are one old dude! We have a major generation gap! I will turn 46 in Oct.
Sometimes I still feel young, but when chatting with 30 year olds, it reminds you that
your not 25 anymore...I have friends my age that can run a marathon, and ones that
get tired just walking to the mail box.....Go Figure
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Old 06-15-10, 06:06 AM   #22
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re: 45 mph on a 26" MTB bike and tire ... doubtful
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Old 06-15-10, 07:43 AM   #23
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re: 45 mph on a 26" MTB bike and tire ... doubtful

http://www.youtube.com/watch?v=JLRDRzMWIsg

138mph on a mountain bike. Find a steep hill and anything is possible. Of course, he crashed.

Still doubtful?
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Old 06-15-10, 07:49 AM   #24
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wow. you ride down a volcano? OK, I guess one can reach that speed on a road with a MTB but it's doubtful you'd be safe doing it or even try it again. if you do, I don't even want to watch. I guess these forums bring together the very best at everything so congrats to the speed but stay safe dude. I once went 130 in a Chevy citation but I wouldn't do it again ...
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Old 06-15-10, 08:07 AM   #25
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re: 45 mph on a 26" MTB bike and tire ... doubtful
Why?
I've broken 50 mph several times with a 26" mtn bike, on the 9% downhill on CO 93 between CO 128 and Marshall Road.
This is the Northbound leg of the Morgul Bismarck.
To break 50 requires a tail wind.
W/o a tail wind, I generally peak in the mid forties.

My personal record is 54.5 mph coming down The Wall of the M-B (peaks at 12%) on my road bike.
This happened a couple week ago with a hell of a tail wind, and *no* pedaling whatsoever.
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