Bross Zenith A 105 R7120 Alloy Road Bike 12 Speed
Bross Zenith A 105 R7120 Alloy Road Bike 12 Speed
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The BROSS Zenith A R7120 is designed for riders seeking performance and value. Built with a lightweight alloy frame, a carbon fork, carbon Integrated handlebar, and fully integrated internal cable routing, it delivers sleek aerodynamics and precise handling. Equipped with Shimano 105 R7100 2x12-speed drivetrain and powerful hydraulic disc brakes, the Zenith A5 ensures smooth shifting, reliable stopping power, and comfort on long rides. Perfect for road enthusiasts looking for a modern, race-inspired bike at an accessible price.
Specifications
- Frame: BROSS Zenith Alloy, internal cable routing, flat mount disc, 142x12mm, BSA-threaded BB
- Fork: BROSS Zenith A Carbon, internal cable routing, flat mount disc, 100x12mm
- Headset: BROSS Fully Hidden Internal Cable Routing
- Handlebar: BROSS Carbon Integrated Internal Cable Routing
- Seatpost: BROSS Zenith Alloy
- Wheelset: BROSS Alloy
- Tires: Continental Ultra Sport 700x28C
- Shifters/Dual Control Levers: Shimano 105 ST-R7120, 2x12-speed
- Front Derailleur: Shimano 105 FD-R7100
- Rear Derailleur: Shimano 105 RD-R7100
- Crankset: Prowheel RPM Alloy hollow tech 50/34T
- Cassette: Sunshine 11-34T
- Chain: KMC X12
- Saddle: SR Saddle
- Grip: BROSS Grip
- Brake Calipers: Shimano BR-R7170
- Rotors: ZOOM Disc 160mm
- Weight: 10 kg in size M
Size Chat:
- 2XS:150-160cm
- XS: 157-166cm
- S: 165-174cm
- M: 170-178cm
- L: 175-183cm
- XL:180-190cm

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Check your Bike Size
Find Your Perfect Fit
Choosing the right bike size is crucial for comfort and performance. Use this guide to find your ideal fit.
Road Bikes
| Height | Frame Size |
|---|---|
| 5'0" - 5'3" (152-160cm) | 47-49cm (XS) |
| 5'3" - 5'6" (160-168cm) | 50-52cm (S) |
| 5'6" - 5'9" (168-175cm) | 53-55cm (M) |
| 5'9" - 6'0" (175-183cm) | 56-58cm (L) |
| 6'0" - 6'3" (183-191cm) | 59-61cm (XL) |
| 6'3"+ (191cm+) | 62cm+ (XXL) |
Mountain Bikes
| Height | Frame Size |
|---|---|
| 5'0" - 5'4" (152-163cm) | 13-14" (XS) |
| 5'4" - 5'8" (163-173cm) | 15-16" (S) |
| 5'8" - 6'0" (173-183cm) | 17-18" (M) |
| 6'0" - 6'2" (183-188cm) | 19-20" (L) |
| 6'2"+ (188cm+) | 21"+ (XL) |
Need Help?
Still unsure about sizing? Contact our team for personalized recommendations.