07 November 2015 ~ 7 Comments

How to “Randoize” a TT Bike


Last year, I was surprised that on the 24-hour races I was in, how many how full-on TT bikes there were, instead of a regular bike with clip-on aerobars. In December of 2014 I picked up a 2nd hand Cervelo P3C time trial / triathlon bike (for a song). Since many (most) of my training rides are solo, I figured “why not use a TT bike?” as it is faster. The exception is those routes that have a lot of steep climbing as the front chainring is 53/39, instead 50/33 like my other distance bikes. So this summer, but many of my 100K and some of 200K rides I have been using this machine.

Here is how to “Randoize” a TT bike (trick it out for use in randonneuring):

~ Add a second water bottle up underneath the aerobars with a hose that I can reach while writing. (This bike only has one water bottle attachment point.)

~ Add a custom-made eoGEAR bike bag that has Velcro long enough to go around the flat seatpost.

~ Long cage derailleur and a 12/30 cassette to make it easier getting up those nine or 10% hills.

~ Add a light extension bracket so the front main light is sitting below the handlebars. This position shows the texture and holes in the road better.

~ Mountain bike pedals to facilitate shoes that are easy to walk in.

~ Heavily padded TT saddle which presumably will absorb some of the vibrations of this stiff bike.

~ 38mm carbon wheels switch still except a standard 48 mm Presta valve. Deep enough to be slightly aero, but not so deep you get blown over in most cross winds.

7 Responses to “How to “Randoize” a TT Bike”

  1. Ed 8 November 2015 at 3:31 pm Permalink

    Richard, our setups are amazingly similar. I’m also a Rando doing my first 24 hour race at Borrego this week. I will be on a black and red Cervelo S3 road bike with clip ons and aero wheels. Only difference is I put my water bottles behind the seat. I did a 200k, 300k and 600k this way excepting the handlebar bag, I elected to remove it for the race. See you there. I will look you up. I am in the youngster’s class (55-59). GL Ed Rusa#560

  2. Rando Richard 8 November 2015 at 6:23 pm Permalink

    Ed, I was thinking of putting one bottle behind the saddle. Can you access it while riding?

  3. Ed 9 November 2015 at 5:15 pm Permalink

    I have an XLAB 400 wing that attaches to the seat rails. I have two waterbottle cages fixed to it. I have tubes and tire irons in the middle well of the XLAB. I have no problem reaching to get bottles. I used this on PBP. At Borrego I additionally plan to use a water bottle connected to my clip on bars in a horizontal fashion. It has a straw. I am not sure if I will like this straw deal. I normally grab a 2-4 oz drink every 10 minutes. I will have in effect three bottles on the bike and will stop about every 100 miles (riding upsupported…will stop every 5 or 6 laps). It took my one ride to be comfortable reaching to my hip for the bottle and maybe two rides before I could put it back instantly without fumbling around. Depending on who’s aerodynamic lies you wish to believe, elimination of the two bottles on the seat and down tubes cuts either 30 or 50 grams of drag. Not huge.

  4. Rando Richard 9 November 2015 at 5:33 pm Permalink

    Today, I adapted a SKS single bottle holder to attach behind my seat post and tried it on a training ride. But then where do I put my bag with flat repair stuff? Under it maybe, or in my jersey? I may stick with the bottle under the aerobars and one on the frame.

  5. Ed 10 November 2015 at 3:17 pm Permalink

    The flat repair stuff is why I went with the xlabs wing, I can fit two tubes and levers or one tube and a CO2. I usually mount a small Lezyne pump to the cages. I am pretty sure the positioning of bottles is not a big deal compared to the positioning of our bodies. I had a fitting for TT position and tried it out on a 300k ride. Too low. I raised the position a bit. Hope it is good at around sunrise Saturday morning and I have 240 or so miles in the bank. Optimism never hurts.

  6. Ed 23 November 2015 at 6:02 pm Permalink

    Congrats on your win. Do you get to wear the rainbows on your jersey sleeve?

  7. Rando Richard 24 November 2015 at 8:33 am Permalink

    Ha! At least they had an awards ceremony. Last year, due to the small size of the restaurant, there was none. How did you day go?