Congratulations to Ralph Diseviscourt for setting 11 new records from 100km all the way to 24 hours. Here they are all.

Distance Event Kilometers Time Avg Sp (Km) Avg Sp (Miles) Existing records 18-49, Male, Solo, Standard bike new record
100 Km Outdoor Velodrome 02:20:30.93 42.6999 26.5325 Mikel Azparren, 2017-08-13, 2:25:37 yes
200 Km Outdoor Velodrome 04:50:09.92 41.3557 25.6973 Mikel Azparren, 2017-08-13, 5:08:24 yes
300 Km Outdoor Velodrome 07:24:46.24 40.47 25.15 Celso Fonseca, 2017-11-18, 9:05:41 yes
500 Km Outdoor Velodrome 12:38:11.92 39.57 24.59 Mikel Azparren, 2017-08-13, 16:08:33 yes
Distance Event Miles Time Avg Sp (Miles) Avg Sp (Km) Existing records 18-49, Male, Solo, Standard bike new record
100 Mile Outdoor Velodrome 03:50:52.35 25.99 41.82 Chris Gottwald, 2013-07-05, 3:55:55 yes
200 Mile Outdoor Velodrome 08:00:19.51 24.98 40.21 none yes
300 Mile Outdoor Velodrome 12:11:12.77 24.62 39.62 Celso Fonseca, 2017-11-18, 15:31:59 yes
500 Mile Outdoor Velodrome 20:39:57.52 24.19 38.94 none yes
Timed Event Miles Kilometers Avg Sp (Miles) Avg Sp (Km) Existing records 18-49, Male, Solo, Standard bike new record
6 Hour 153.922 247.713 25.65 41.29 none yes
12 Hour 295.516 475.587 24.63 39.63 none yes
24 Hour 576.542 927.855 24.02 38.66 none yes


Ralph Diseviscourt 2021-08-14 mov-1

1000km World Record Attempt – Outdoor Velodrome

By Ralph Diseviscourt – 14/15 August 2021 

Record attempt  

1.000 km Outdoor Velodrome in Rochefort (Belgium / Europe), < 50yrs 

Name of rider(s)  

Ralph DISEVISCOURT aka Dizzy 

Start date and exact start time to the nearest minute  

Due to heavy inundations in Belgium some days prior to the event scheduled for the weekend of the  14/15 July 2021, the WRA has been postponed for 3 weeks. 

Start Date : Saturday August 14th, 2021 at 2:00pm (Luxembourg time) 

Due to technical problems, the Start has been postponed and took finally place at 3:42pm. 

Exact start location described so that someone else could find the same spot  The attempt took place on the 400 meters outdoor Velodrome of Rochefort – Jemelle in Belgium  (Europe). The old survey of the track was unfortunately destroyed by the floodings prior to the  attempt. The new survey conducted by Schroeder & Associés confirmed a track length of 400,38 meters per lap. The surface of the track gives perfect grip, but isn’t one of the smoothest, reason why  I opted for tyres with a width of 28mm rather than 26mm to have enough comfort for the 24h. The  whole track is perfectly illuminated in the night which is another important advantage compared to  last year’s track in Vianden. 

What were conditions like?  

The weather conditions were close to perfect after weeks of ongoing heavy rain in the region: sunny  with only a few clouds, around 25 degrees Celsius during daytime and very little wind. The track is  located at 180 meters above sea level in the valley of the river La Lomme. During the night  temperatures were around 12-13 degrees Celsius. 

Why did you want to do a record?  

With lots of ultra-cycling races canceled once again in 2020 (I was supposed to do Red Bull Tran  Siberian Extreme in June/July), I was looking for a new challenge as I managed to keep a decent level  of fitness over the last months. Several great riders undertook attempts to break my WRs established  last year in Luxembourg, and I was convinced that at least one of them would succeed, but none did  in the end. However I was prepared and motivated to bring the records back to Luxembourg. After my  first attempt in 2020 which was a very spontaneous challenge, I knew I could do better with lots of  marginal gains to work on. Of course I also heard about Christoph Strasser’s magic ride above the  1,000km barrier in 24 hours a couple of weeks prior to my attempt, and I knew it would be very tough  to get close to him. But I wanted to give it a try and was optimistic given recent test results. 

What equipment did you use? Anything special? 

1.000km World Record Attempt – Outdoor Velodrome

By Ralph Diseviscourt – 14/15 August 2021 

I used a new 2021 Specialized Shiv Tria bike, equipped with Shimano DA Di2, Roval clincher disk wheel  at the rear and CLX60 at the front with Turbo Cotton clincher tires. Specialized S-Works shoes were  provided by my local bike shop (sponsor) Trisport, as well as Ceramic Speed components (rear  derailleur). Aero clothes and helmet were generously provided by Endura. I had no mechanical issue  at all during the whole attempt! 

What did you eat & drink?  

A detailed plan has been elaborated by the Luxembourg Institute for High Performance in Sports LIHPS  based on the results received during the tests conducted 2 weeks prior to the attempt. Nutrition was  99% based on liquids (selection of isotonic drinks, protein shakes, etc.) and gels. I had to stop 4 times  for 3 minutes (around 12 minutes in total) to relieve myself giving me also time to eat a banana or a  half. 

What was the best part?  

The arrival was very emotional as always. I managed to break the targeted 24h records during my  attempt at much steadier pace than last year. After 500km I was 15min slower than in 2020 but ended  up some 20min faster when approaching 24h. 

My wife and my 2 daughters, my family and friends were waiting for me, so I couldn’t retain the tears  when falling into their arms after 24 hours of intense efforts. 

Not to forget the numerous spectators that cheered me on during the 24 hours, even during the night! 

What was the hardest part?  

It only took a couple of hours in the attempt for me to realize that I was not in one of my best days, I  felt a clear lack of power compared to previous longer rides done in the preparation phase. It was  mentally very difficult to keep on and remain motivated knowing that I would most probably not reach  the distance I aimed for. That’s life, we are no machines.  

Did anything particularly unusual happen?  

Yes, the lack of power ! 

Exact finish location described so that someone else could find the same spot  Same as the start location described above.  

Exact finish time 

August 15th, 2021 at 3:42pm (Lux time) after having covered 927,861km based on the official track  survey provided by Schroeder & Associés.