Comfort road bicycle has a longer wheel base so its easy to keep in a straight line. It also has a bigger head tube so you are more upright less stress on your back and neck. Also they usually have a bit of a short top tube as well. All of this does however make them less responsive and weigh more then a racing frame. Being in a high position is less efficient as you are using your quads rather then your Gluteus muscles to power the bicycle. These are smaller less efficient muscles and its why you see top pros bent over quite a bit. Finally more upright position is less aerodynamic. But if your goal is to be comfy and you have neck and back issues plus just want a bit of fitness on a bicycle then comfort is great and will give you more riding pleasure. Here is a great deal on a carbon road version which will soak up vibration from pot wholes and rough pavement:
Jamis Xenith Endura Sport 2013 with new internal cabling size 51, 54, 56, 58, 61 available. We ship North American wide or you can come by our shop to test ride one open 7 days a week.
Borrowing heavily from Jamis’ award winning Xenith Competition design, the Jamis Xenith Endura Sport 2013 Road Bike strikes a balance between performance, comfort and compliance. Every Endura model features all the performance and design attributes of the racing bikes with slightly taller head tubes, longer wheelbases and relaxed frame angles. Fast and long rides can now be enjoyed, not just endured. Introducing the new Endura Series from Jamis: where “plush” meets “high performance”.
The Xenith Endura series is designed with flexibility in mind, like long-reach brakes for greater tyre selection and room for fenders, and rear eyelets for a brake bridge mounted rear carrier.
Monocoque Carbon Hollow Formed Crown Tapered Fork
|High performance carbon fiber composite with mid modulus fibers, Dyad Plus T700/FRP lay-up, tri-oval shaped top and down tubes with SST tubing diameters and internal cables, 1 1/8-1 1/2″ head tube, PressFit 30 bb shell, asymmetrical chainstays, twin SST seat stays with carrier/fender eyelets, forged one-piece dropouts with replaceable derailleur hanger|
|fork||Jamis full carbon composite fork, 1.5″ hollow formed crown, monocoque one-piece forming technology, alloy dropouts with one eyelet|
|headset||FSA integrated, sealed bearing, 1 1/8-1 1/2″|
|Wheels||Alex DC19 double wall alloy rims with CNC sidewalls, 28/32H, Formula alloy hubs with qR and 14g stainless steel spokes|
|Tires||vittoria zaffiro, 700 x 25c|
|Derailleurs||Shimano Tiagra RD-4600SS rear and Taigra FD-4600 braze- on front with 34.9mm alloy clamp|
|Shiftlevers||Shimano Tiagra ST-4600 Dual Control STI, 20-Speed|
|Chain:||SRAM PC1031 w/Powerlock|
|Cassette||Shimano 10-Speed 12-30T|
|Crankset||FSA vero compact double, 50/34T, 170mm (48/51), 172.5mm (54/56), 175mm (58/61)|
|BB Set||FSA sealed cartridge, 68 x 108mm|
|Brakeset||Tektro R317 alloy long reach dual pivot calipers with Shimano Tiagra ST-4600 STI brake levers|
|handlebar||Jamis Ergo, 6061 aluminum, 31.8 x 400mm (48/51), 420mm (54/56), 440mm (58/61)|
|Stem||Jamis Road, 3D forged 6061 alloy, 7 ̊ x 90mm (48/51), 100mm (54/56), 120mm (58/61)|
|grips||Jamis gel suede tape with Jamis logo, gel inserts on top bar and “J” end plug|
|Seatpost||Jamis carbon fiber micro-adjust, 31.6 x 300mm with Jamis 7075-AL CNC aluminum 1-bolt seat post clamp|
|Saddle||Selle San Marco SPID Arrowhead with Syntex cover and carbon steel rails|
|Sizes||48, 51, 54, 56, 58, 61cm|
|Colour||Gloss Carbon/victory Yellow|