The CYCTRAC R18 is a full-carbon aero road bike built on a T800/T1000 high-modulus frame with fully internal cable routing, finished at 7.7–7.8 kg depending on build. It is aimed at riders who want race geometry and a carbon wheelset without paying mainstream-brand prices, and it is one of the few complete bikes offered with a WheelTop wireless 13-speed groupset alongside the usual Shimano options.
Which groupset should you choose?
Three builds share the same frame, fork, cockpit and wheelset, so the choice is purely about shifting.
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WheelTop GEX 1×13S wireless — no front derailleur, no shift cables, and an 11–46T cassette that covers steep climbs on a single ring. The simplest drivetrain here to maintain, and the lightest on cable friction. Best if you ride mixed terrain and dislike front-shift faff.
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Shimano 105 R7120 2×12S hydraulic — mechanical shifting with hydraulic discs. No batteries to charge, no firmware, and parts available in any bike shop worldwide. Best if you tour, race far from home, or simply prefer cables.
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Shimano 105 R7170 Di2 2×12S — semi-wireless electronic shifting with the tightest gear steps of the three. Best for racing and fast group rides where consistent, instant shifts under load matter.
How much does the CYCTRAC R18 weigh?
Between 7.7 kg and 7.8 kg depending on build and size. That figure already includes the 58 mm carbon wheelset and carbon integrated cockpit — components that are usually an upgrade on bikes at this price, and the reason the R18 lands close to bikes costing two to three times more.
What does the aero frame and integrated cockpit actually do?
The R18 frame uses an aero tube profile with every cable and hose routed inside the one-piece carbon handlebar-and-stem unit (400 × 90 mm) and through the headset, so nothing sits in the airflow at the front of the bike. The seat post is a matching aero carbon section with a hidden clamp. In practice the payoff is at sustained speed — solo efforts, flat road racing, triathlon and time trial — rather than at climbing pace.
Which size fits you?
Five frame sizes cover riders from roughly 155 cm to 195 cm. If you fall between two sizes, the smaller frame gives a more aggressive, aero position and the larger gives more comfort over distance.
| Frame size |
Rider height |
| 43 cm |
155–165 cm |
| 46 cm |
165–175 cm |
| 48 cm |
172–182 cm |
| 51 cm |
178–188 cm |
| 54 cm |
185–195 cm |
Specifications
| Frame |
R18 high-modulus carbon T800 & T1000, aero profile, internal cables, disc, thru-axle 12 × 142 |
| Fork |
R18 high-modulus carbon T800, disc, thru-axle 12 × 100, 700C |
| Cockpit |
One-piece carbon integrated handlebar and stem, 400 × 90 mm, fully internal routing |
| Seat post |
High-modulus carbon, aero racing profile, hidden frame clamp |
| Rims |
IRS high-modulus carbon, 58 mm deep, 7.2 mm |
| Hubs |
RS-H280 alloy ultralight, 54T ratchet, 4 sealed bearings, centerlock, 20F/20R |
| Spokes |
High-modulus carbon, 5.2 |
| Tyres |
Maxxis Pursuer foldable, 700 × 28C, black |
| Brakes |
Hydraulic disc, 160/160 mm |
| Headset |
CNC alloy, sealed bearings, 52 × 52 mm |
| Bottom bracket |
Threaded, 147 × 24 mm |
| Saddle |
RS carbon fibre, ultralight racing |
| Wheel size |
700C |
| Frame sizes |
43 / 46 / 48 / 51 / 54 cm |
| Colours |
White / Matte Black / Matte Blue |
| Net weight |
7.7–7.8 kg |
Drivetrain by build
| Build |
Shifters & derailleurs |
Crankset |
Cassette |
Chain |
| WheelTop wireless |
WheelTop GEX 1×13S wireless, rear only |
RS alloy hollow, 48T |
Sunshine 13S, 11–46T |
SUMC 13S |
| Shimano 105 R7120 |
105 R7120 2×12S hydraulic, R7100 front & rear |
105 R7100 hollow, 34/50T |
105 R7100, 11–34T |
Shimano M7100 12S |
| Shimano 105 Di2 |
105 R7170 2×12S Di2, R7170 front, R7150 rear |
105 R7100 hollow, 34/50T |
105 R7100, 11–34T |
Shimano HG6100 12S |
What's in the box
- CYCTRAC R18 bike, assembled and boxed
- Alloy pedals with sealed bearings
- PC bottle cage and basic tool kit
- Safety reflectors for handlebar, seat post and both wheels
- Manual and warranty card
Shipping and delivery
Shipped from Hong Kong in a padded bike box. Hong Kong customers can choose local delivery or self pick-up at checkout; international shipping is calculated at checkout by destination. Because the bike is packed 90% assembled, a bike shop or a confident home mechanic needs about 30 minutes to fit the bars, wheels, pedals and saddle and check the brakes before the first ride.
