Fastest Bicycle Speed Record

Triathlon Forum
1

I know this is old news - 1995 record - but it’s a good gee-whiz record none-the-less

http://www.guinnessworldrecords.com/index.asp?id=43641

Fastest Bicycle Speed
The highest speed ever achieved on a bicycle is 268.831 km/h (167.043 mph), by Fred Rompelberg (The Netherlands) at Bonneville Salt Flats, Utah, USA, on October 3, 1995. His record attempt was greatly assisted by the slipstream from his lead vehicle. Fred has been cycling professionally for nearly 30 years and during that time has held 11 world records
http://tinypic.com/ae4e2r.jpg

2

With 700x23 tires he would have to crank over a 235x11 gearing @100 rpm. Holy smokes…that’s a big gear. I wonder how big the wheels were

3

LOL, I wonder how large in diamter that chainring would be!! it would rip my nuts off! lol The bike must have had some internal hub gearing or something… jeez

4

ah nevermind, he was probably holding on to the vehicle anyway!

5

Found the guy’s web page detailing the ride

http://www.fredrompelberg.com/en/html/default.asp
.

6

With 700x23 tires he would have to crank over a 235x11 gearing @100 rpm. Holy smokes…that’s a big gear. I wonder how big the wheels were
This one will shock you… the wheels were 24" wheels!

7

Oh… and it had reduction gears… notice the two chainrings…

8

With 700x23 tires he would have to crank over a 235x11 gearing @100 rpm. Holy smokes…that’s a big gear.
I think Bjorn probably has a chain ring like that in his garage.

9

Oh… and it had reduction gears… notice the two chainrings…
http://tinypic.com/ae5mbp.jpg

10

maybe 168mph! he broke a 152 mph record set by a ironman winner

11

Bet John Howard wishes he’d done that in Hawaii! sub 45min bike split!!! not sure what the following run split might look like.

12

go ahead, critique his aero position
.

13

Being behind a 169 mph windscreen in a full-blown spread eagle would be aero.