Bikes of Irish peloton: Ronan Costelloe’s Specialized Tarmac Pro, Ultegra Di2

Posted on: June 16th, 2017

Specialized Tarmac Pro Ultegra Di2

This Specialized Tarmac Pro with Ultegra Di2 groupset by Shimano carried Ronan Costelloe to A2 victory in the Rás.


Specialized Tarmac Pro, Ultegra Di2

Specialized Tarmac Pro, Ultegra Di2

Above, photo by Sean Rowe of Ronan Costelloe finishing the Rás final stage in Skerries.

By Jessica Lamb

Ronan Costelloe, Newcastle West CC-Rockwell

Rás Category 2 classification winner

Ronan Costelloe took victory in the A2 general classification at the recent An Post Rás and did so on a Specialized Tarmac Pro frame.

It’s not quite a WorldTour bike but it boasts a Tour de France-winning big brother.

Vincenzo Nibali won the French Grand Tour on Specialized’s thoroughbred version in 2014.

Costelloe’s bike is equipped with a Shimano Ultegra Di2 groupset, the cassette 11-28T, pro-choice pedals – Speedplay Zero – and a Romin Pro Saddle.


Specialized Tarmac Pro, Ultegra Di2

Specialized Tarmac Pro, Ultegra Di2

Specialized Tarmac Pro, Ultegra Di2


The bike is finished with Mavic Ksyrium Pro Haute Route wheels, which were supposed to improve Costelloe’s climbing in the hills of Donegal.

“I bought the wheels the week before the Ras,” Costelloe said.

“I got them for Donegal, but on stage seven they filled up with water and nearly 200ml were in the rims.”

This build would cost more than €6,000 new; a better bike and more expensive than many of the Continental teams who rode the Rás are issued with.

Key specifications

  • Frame: Specialized Tarmac Pro
  • Stem & Handlebars: All FSA SLK
  • Groupset: Shimano Ultegra Di2 11-speed, 53-39 chainset, 11-28T cassette
  • Wheelset: Mavic Ksyrium Pro Haute Route
  • Saddle: Romin Pro
  • Pedals: Speedplay

Costelloe took a clear win the A2 classification in the Rás. He was 83rd overall and that put him 13:47 ahead of runner-up A2 Stuart Henry (Antrim Phoenix).

Brian McArdle of Scott-Orwell rounded out the podium some 22:11 back.