NAHBS bike profile: A Shamrock Built for Speed
Shamrock Cycles of Indianapolis found its sweet spot in the handmade market building cyclocross bikes. Yet Shamrock owner and builder Tim O’Donnell also loves building road bikes, and he just couldn’t resist building a road racing speed machine for himself.
All Photos © John Watson The Radivist
And he went all out. For last weekend’s North American Handmade Bicycle Show (NAHBS), the blue steel Shamrock on display in the Zipp and SRAM booth was a showcase for cutting-edge road technology:
The steel frame is Columbus Spirit with Columbus Life tubing in the chainstay. The blue bike features a distinctive winter-twig like paint scheme thanks to a talented local artist. “I built it specifically for eTap. There’s no braze ons, there’s no holes, nothing.”
O’Donnell added: “It’s a little bit of a steeper head angle. It’s a 73-degree head angle where the bike I had before was 72.5. This is a little bit steep seat tube angle as well.
“I built the bike with a little bit oversized tubing because knowing how I ride, I wanted something that was a little bit stiffer. I’m something of a hammerhead. The oversized tubing certainly worked. It’s traditional road bike geometry but more race oriented vs. all-arounder.”
At NAHBS, the bike featured the Zipp SL-70 Aero and SL Sprint stem with new Matte Black finish. The bar’s wing-shaped aero top and stem’s beefy but light-weight construction blend nicely with the frame’s oversized head tube. The SL Speed seatpost completes the uniform look and helps keep the bike at around 17 ½ pounds even with thinker walled tubing for durability.
“I love the way the bike rides,” O’Donnell said. “It’s very quick handling. It just feels fast.”
Builder: Shamrock Cycles, Indianapolis