Mechanical Build
X-LAB RS7 105 Mechanical
The lower-cost Mox drop-bar triathlon build.
around$3,000
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My First Triathlon
X-LAB RS7
We start with the X-LAB RS7 and build it into a road + aero platform with a separate cockpit, clip-on aerobars, and a position configured around you.

Mox Recommended Platform
X-LAB RS7
The RS7 is the base. We build the cockpit around you.
X-LAB RS7 105 Mechanical
The lower-cost Mox drop-bar triathlon build.
around$3,000
Mox Recommendation
X-LAB RS7 105 Di2
The full Mox drop-bar triathlon build, with shifting from the aero position where configured.
around$3,700
X-LAB RS7 105 Mechanical + Wahoo KICKR CORE 2

The Mechanical build plus a smart trainer so you can train through winter on the same bike.
Trainer options: 11-Speed Cassette or Zwift Cog & Click. Same trainer price either way.
starting around$3,550
Mox Recommended Complete Setup
X-LAB RS7 105 Di2 + Wahoo KICKR

The full Di2 build plus the higher-end Wahoo trainer for a complete indoor + outdoor setup.
Trainer options: 11-Speed Cassette or Zwift Cog & Click. Same trainer price either way.
Our preferred complete setup: Di2 shifting, the higher-end Wahoo KICKR, and Zwift Cog & Click for winter training.
starting around$4,550
These are starting builds, not fixed packages. We use them as a base because they cover the most common first-triathlon setups. From there, we can change stem length, handlebar width, aerobars, shifting, trainer setup, hydration, cages, and other parts around your fit, goals, and budget.
Want something different? If you already know you want a specific cockpit, carbon upgrade, different handlebars, or another build direction, tell us what you have in mind. We can build around it.
We chose this platform because the cockpit and training setup can be built around the rider. Stem length, handlebar width, aerobar position, Di2 extension shifting, and trainer setup can all be matched to the rider, goals, and budget.

Stem
Vision / FSA NS SMR Alloy
Fit-selected lengths from 70–130mm.

Handlebar
Vision Trimax Aero
A conventional road bar that allows the aero system to be built around the rider.

Aerobars
Profile Design Sonic Ergo 52a
Adjustable clip-on extensions for the aero position.

Di2 Shifting
Shimano Di2 bar-end / extension shifters
Used on the full Di2 build where appropriate.

Trainer
Wahoo KICKR CORE 2
The lower-cost smart-trainer option for the Mechanical + Trainer package.
Available with an 11-speed cassette or Zwift Cog & Click.

Trainer
Wahoo KICKR
The higher-end smart-trainer option for the Di2 + Trainer package.
Available with an 11-speed cassette or Zwift Cog & Click.
You do not need to choose the stem, bar, extensions, or trainer setup yourself. That is part of the fitting and build process.
Build totals are rounded estimates before tax. Final configuration depends on fit, cockpit dimensions, parts selected, and installation.
The Entry Point
There is a large gap between a normal road bike and a dedicated triathlon bike. For riders shopping below dedicated-tri-bike territory, the RS7 is where we usually start: the lowest-cost complete race-ready platform we currently recommend.
X-LAB bikes at MoxRoad
Rides like a normal road bike
Cockpit
Replaceable for aero extensions
Seasons
A platform you can grow into

Why This Platform
The manufacturer tells you what the RS7 is. This is why we recommend it as a first serious triathlon platform.

A carbon frame that rides like a proper road bike, so it earns its place on group rides and long training days, not just race day.
Carbon wheels come stock, so the build starts race-ready instead of needing a wheel upgrade first.

A dual-sided Branta power meter crankset (52-36T) comes stock, with ANT+ and Bluetooth through the X-LAB app. You can train and pace by power from the first ride.

Build Difference
The Conversion

Step 1
Stock integrated cockpit.
Step 2
Separate FSA stem and an appropriate FSA road bar.
Step 3
Profile Design or Vision clip-on extensions.
Step 4
Pads, extensions, reach, stack, saddle, and Di2 aero shifting where applicable.
Geometry
Stack and reach decide where the bars and aero extensions can sit. We read them against your fit to choose the size, stem, and spacers before the bike is built.

| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| ASeat Tube Length | 420mm | 440mm | 470mm | 490mm | 510mm | 530mm |
| BTop Tube Length | 500mm | 515mm | 531mm | 550mm | 570mm | 590mm |
| CHead Tube Length | 130mm | 135mm | 145mm | 160mm | 175mm | 200mm |
| DSeat Tube Angle | 75° | 75° | 75° | 74° | 74° | 74° |
| EHead Tube Angle | 70° | 72° | 73° | 73° | 73° | 74° |
| FChainstay | 410mm | 410mm | 410mm | 410mm | 410mm | 410mm |
| GWheelbase | 973mm | 976mm | 982mm | 993mm | 1006mm | 1016mm |
| HBottom Bracket Drop | 72mm | 72mm | 70mm | 70mm | 68mm | 68mm |
| IStack | 526mm | 535mm | 546mm | 561mm | 574mm | 602mm |
| JReach | 360mm | 370mm | 380mm | 390mm | 400mm | 412mm |
| KFront Center | 574mm | 577mm | 581mm | 593mm | 606mm | 616mm |
| OStand Over | 737mm | 752mm | 772mm | 789mm | 807mm | 830mm |
Highlighted rows are the numbers we lean on most when sizing a road + aero build. Letters match the diagram.
The cockpit gets built around your position. Ideally we establish it before finalizing cockpit dimensions; if you already own the bike, we can fit and refine the system afterward. The fitting shapes:
Priced separately from the bike build unless quoted as part of a complete package.
How far the aero position can go depends on your fit, flexibility, and proportions.
As your budget moves into dedicated-tri-bike territory, or if triathlon is clearly your primary riding, we may recommend a dedicated triathlon bike instead. The RS7 build is for riders who want a lower entry price, one bike for road and triathlon, and a system they can develop over multiple seasons.
Browse triathlon bikesFAQ
No. Many athletes start with a road bike set up with clip-on aerobars and a fitted aero position. It covers Sprint and Olympic races and 70.3 preparation while remaining a useful road bike.
It is a road bike with a conventional drop handlebar plus clip-on aero extensions. You can ride normally on the hoods and drops, then move into an aero position on the extensions for triathlon training and racing.
Both use the same drop-bar + aerobar approach and are fit and built around the rider. The Mechanical build keeps shifting at the road brake/shift levers and is our lower-cost entry point, with complete builds around $3,000. The Di2 build adds electronic shifting and allows shifting from the aero extensions where configured, with complete builds around $3,700. Prices are approximate before tax and final configuration depends on fit, cockpit dimensions, parts selected, and installation.
The RS7 ships with an integrated one-piece cockpit. Replacing it with a separate FSA stem and an appropriate FSA road handlebar lets us mount compatible clip-on aerobars and set reach and cockpit dimensions around your position.
Yes. We can convert the cockpit and add clip-on aerobars at any point. Planning the cockpit at the time of purchase usually means the stem and bar are chosen around your aero position from the start.
Yes. The RS7 is a carbon road bike first. It remains useful for group rides, climbing, and long training days, with the aero extensions available when you want them.
For many athletes, yes. A road bike with a properly fitted aero position is a practical setup for 70.3 preparation. Whether it is the right long-term choice depends on your fit, goals, and how much of your riding is triathlon-specific.
Yes, for many riders. Long-course training depends on a position you can hold for hours, so the fit matters more than the bike category. We will talk through whether this build or a dedicated triathlon bike suits your goals.
When your budget reaches dedicated-tri-bike territory, or when triathlon is clearly your primary riding, a dedicated triathlon bike may be the better answer. The RS7 build is for riders who want a lower entry price and one bike for road and triathlon.
Ideally before we finalize the cockpit, so the stem, bar, and extensions are chosen around your position. If you already own the bike, we can fit and refine the system afterward.
We help you choose the bike, fit it to you, build it around your race goals, and keep it running. Fitting, the cockpit conversion, aerobar setup, Di2 configuration, and ongoing service happen in our Chicago shop, and the components and trainers we recommend are ones we install, fit, and support ourselves.
Yes. A Wahoo KICKR CORE or another appropriate Wahoo smart trainer is optional and not part of the bike build. Add it now or whenever you want to train indoors.
Custom Builds
These four builds are where we usually start, not where we have to finish. If you want a different cockpit, carbon components, specific handlebars, another trainer setup, or a more custom build, send us your idea and we'll help work through it.
You bring the goal. We help you choose the bike, fit it to you, build it for what you want to do, and keep it running.
What helps us help you
Not sure what you need yet? That's exactly what this is for.
Real recommendations from a Chicago triathlon shop that fits, builds, services, and supports the bikes, components, and trainers we sell. Visit the shop