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Outdoors · Firth Sports
Clip in and chase the horizon on this road bike
Firth Sports AD300 Road Bike 51cm
A 51cm road bike for the rider who wants to log real miles on weekends and commutes alike.
Deal score 4.9 · Good deal
$899.00$1,290.00 Firth Sports's regular price
You save $391.00 at Firth Sports
Checking it's still available…
Why it's a great deal
- Firth Sports lists its regular price at $1,290.00: 30% off by its own figures
Every store we checked
- Firth SportsNew
In stock
$899.00Observed at 3:43 AM
From Firth Sports
- Full L-Twoo R7 hydraulic disc brake system for confident, consistent stopping power in any weather
- Full L-Twoo R7 2x10-speed groupset with 20 speeds for hills and flats
- Lightweight and durable XDSBIKE Ultra-Light Aluminum X6 frame
- Internal cable routing for a clean, polished look
- 700x30c Branta tires for balanced speed and stability on paved roads
- Ergonomic alloy handlebar and comfortable Branta road padded saddle
- Sizes
- 45cm, 48cm, 51cm, 54cm
- Materials
- XDSBIKE Ultra-Light Aluminum X6 frame; XDSBIKE one-body aluminum fork, thru-axle; Branta A35 alloy double wall rim 700C (35mm profile); Branta 700C x 30C black
- Fit
- Frame sizes 45cm, 48cm, 51cm, 54cm; 51cm recommended for riders 5'7" to 5'9"
- Sizing
- Size chart recommends 51cm for riders 5'7" to 5'9"; one reviewer at 5'8" with a 32" inseam found the 51cm too small after a bike fit
- Shipping
- Free shipping (contiguous U.S.); most orders arrive in 3–7 business days; most orders delivered via FedEx and UPS Ground within 5 days after processing
Size chart
| Frame Size | Recommended Rider Height |
|---|---|
| 45cm | 5 feet 1 inch to 5 feet |
| 48cm | 5 feet 5 inch to 5 feet |
| 51cm | 5 feet 7 inch to 5 feet |
| 54cm | 5 feet 9 inch to 6 feet |
What buyers say
Buyers like
- Very light and agile for an aluminum bike
- Quick and accurate gear changes
- Great, responsive brakes
- Stable on inclines and fast on flat pavement
- Arrived faster than expected and in excellent condition
- Good value for the performance
Buyers complain about
- 51cm size chart fit too small for a 5'8" rider with 32" inseam, causing hip pain
- Some consider the price high
Specs
- Size
- AD300 // 51cm
About the Firth Sports AD300 Road Bike 51cm
The Firth Sports AD300 is an entry-level aluminum road bike built for riders stepping up from hybrids or fitness bikes. It pairs a stiff alloy frame with a carbon fork and a drop bar setup, putting it in the same class as other budget aluminum road bikes from brands like Triban and Giant. It suits newer riders and commuters who want road geometry without a race-bike fit. The 51cm frame is aimed at riders roughly 5'6" to 5'9", so taller riders should look at larger sizes.
Best forFirst-time road bike buyersFitness riders moving to drop barsCommuting on paved roadsRiders around 5'6" to 5'9"
Pros
- Aluminum frame with carbon fork keeps weight reasonable for the class
- Drop bars and road geometry give a proper road position
- 51cm size fits a wide range of average-height riders
- Simple mechanical setup is easy to maintain and upgrade
Cons
- Entry-level components limit shifting crispness