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Available to physical shipping addresses in the 48 continental United States. Some items are subject to additional oversize charges. All bikes are built prior to shipment and may take 2-3 days prior to shipping. Learn more
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The clock poses the most ruthless and flawless opponent you'll ever face. You can't hide in its draft, you can't weaken it by attack, it won't make any tactical errors, and it doesn't need to eat or drink to keep going. They say to keep your friends close and your enemies closer. This notion holds true during the race of truth. The only way to beat the clock is to keep it close. Jamis's T series time trial bikes are relentlessly refined to ring out every bit of speed from every milliwatt of power to ensure that time doesn't slip through the cracks.
It starts with the Xenith T's NACA-compliant aero frame. The T's tri-specific frame hides the rear brake under the chainstays and out of the wind's reach, while a seat tube shroud shields the rear wheel. Working seamlessly with the aerodynamic character of the frame is Jamis's Windshield aero fork with a rear-facing, fully enclosed front brake. The steep 78-degree seat tube angle joined by a 46mm bore PF30 BB system provide an aggressive riding position and a stiff platform for manufacturing watts. Considering the steeper head angle and TT bars, the Xenith T features an optimized fork offset that'll keep you holding a fine line on the long straightaways, while giving the agility to corner with grace and speed when the course gets technical.
To ensure the Xenith T time trial bike fires on all cylinders as you turn yourself inside out, Jamis equips it with Alex RA30 aero rims with a 30mm profile, laced to Formula alloy hubs using bladed stainless steel spokes. The mid-shallow profile keeps things light and moving in a hurry while making it easier to cope with bothersome crosswinds.
As entrance fees can be hard to choke down, the Xenith T offers a clever assembly of components to keep performance optimum, while leaving you with the green to register for that next triathlon. As rear derailleurs are the true workhands of a drivetrain, the Xenith T uses a Shimano Ultegra 6700 rear derailleur, ensuring smooth, precise shifts so that no energy is lost on a miss-shift. Front derailleur duty is handed to the resilience of Shimano 105. The MicroShift 10-speed bar-end shifters offer easy engagement to ensure no energy is lost when making a gear change in the arrow position. With no room for error when racing the clock, the Tektro R725 aero TT brakes and RX 4.1 aero levers offer controlled braking to see you safely though those final turns.
As a true TT machine, the Xenith T features a Profile Design dominated cockpit lineup, including T2+ S-bend extension bars, a Profile Air Wing base bar, and a Profile Aris stem. To accommodate the aero formed seatube, Jamis places their Xenith T Aero seatpost with a Selle San Marco Ponza TT saddle which features additional cushioning on the nose for maximum comfort in the aero position.
It won't be until you're standing on the podium, drained and dazed from your effort, that you'll realize the clock was never an enemy, but a friend all along. The Jamis Xenith T is here to spark that friendship.
| Frame | High performance carbon fiber composite with mid modulus fibers, Dyad Plus T700/FRP lay-up, Tri/TT frame, NACA compliant profiles, chainstay-mounted rear brake, internal cable routing, integrated seat post clamp design, seat tube with full rear wheel recess, flat-oval top tube, aerofoil seatstays, PressFit 30 BB shell, rear-entry horizontal dropouts with axle-position adjustment bolts |
|---|---|
| Fork | Windshield aero full carbon with rear-facing/enclosed front brake for reduced aerodynamic drag, with brake pad adjustment ports |
| Headset | FSA Internal AheadSet, 1 1/8" |
| Wheelset | Alex RA30 aero rim, 20/24H, 30mm aero rim profile, Formula alloy hubs with QR and Formula bladed stainless steel spokes |
| Tires | Vittoria Zaffiro Slick, 700x23c (Vittoria Rubino 650x23c for XS) |
| Brakes | Tektro R725 forged alloy hidden U-type TT calipers with SwissStop cartridge pads and Tektro TL-720 aero brake levers |
| Shifters | microSHIFT Bar End Shifters 20-Speed |
| Front Derailleur | 105 FD-5700 braze-on |
| Rear Derailleur | Shimano Ultegra RD- 6700 10-speed |
| Crankset | FSA Gossamer double with Press Fit 30, 53/39T, 170mm (XS/S), 172.5mm (M), 175mm (L/XL) |
| Bottom Bracket | FSA PressFit 30 |
| Cassette | Shimano 10-Speed 11-25T |
| Chain | SRAM PC1031 w/Powerlock |
| Pedals | N/A |
| Handlebar | Profile Design T3+ Drop-bend extensions with Air Wing base bar, 400mm (XS/S/M), 420mm (L/XL) |
| Stem | Profile Design Aris, 3D forged 6061 alloy, 7º x 80mm (XS), 90mm (S/M), 100mm (L/XL) |
| Saddle | Selle San Marco Ponza TT with Syntex + Kevlar cover and carbon steel rails |
| Seatpost | Jamis Aero carbon post with integrated seat post clamp |
Note: Components are subject to change without notice.

| Size | XS/47 (650c) | S/51 | M/54 | L/56 | XL/58 |
|---|---|---|---|---|---|
| Top Tube Length (effective) | 19.09/485 | 20.08/510 | 20.67/525 | 21.45/545 | 22.64/575 |
| Seat Tube Length | 18.19/462 | 19.60/498 | 20.12/511 | 21.02/534 | 22.24/565 |
| Standover Height | 28.54/725 | 29.80/757 | 30.31/770 | 31.26/794 | 32.20/818 |
| Head Tube Length | 3.94/100 | 3.94/100 | 4.33/110 | 5.31/135 | 6.30/160 |
| Head Tube Angle | 72° | 71°° | 72° | 72° | 72° |
| Seat Tube Angle | 78° | 78° | 78° | 78° | 78° |
| Wheelbase | 36.14/918 | 38.78/985 | 39.09/993 | 40.04/1017 | 41.30/1049 |
| Chainstay Length | 14.01/356 | 15.35/390 | 15.35/390 | 15.35/390 | 15.35/390 |
| BB Height | 10.04/255 | 10.63/270 | 10.63/270 | 10.63/270 | 10.63/270 |
CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP") Lead, which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Most items SHIP SAME DAY if ordered by 3pm PST and FREE SHIPPING on orders over $50. Please note that oversize charges may still apply on some heavy or large items and free shipping does not apply to PO Boxes.
1-day free standard Shipping on most orders to California, 2-day free standard Shipping on most orders to Nevada, Arizona, & Utah. Other states can expect delivery within 3 to 5 days.
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Bike Shipping: Most complete bikes ship for a $99 oversize shipping fee, unless otherwise noted. Free shipping thresholds do not apply to complete bikes.
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Get free shipping, on most items, with your $50 purchase today. Same day shipping on most orders if placed by 3pm PST. Visit your cart and update the shipping destination to see the estimated delivery days for your order.
This offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and some exclusions apply.
Some large and/or heavy items are subject to additional oversize charges that are separate from standard shipping costs.
All bikes are built, tested, tuned, and ready to ride upon shipment. The bike build process typically takes 2-3 days to complete depending on the bike model and the complexity of the build.
Orders for in-stock items placed by 3PM PST usually ship on the same day. Orders that include special-order or backordered items may be subject to shipping delays depending on product availability. Refer to estimated delivery times in cart when selecting shipping options.