Syndyt 210 Pro XL BMX Racing Bike Frame
- BMX Frame
- Blue
- 4.05 pounds
- 21 inches
A frame for riders who already know their build, not a starter purchase. Solid alloy spec for the class but requires a full parts build around it.
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How it ranks among the 14 bmx frames we track
0 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 14 bmx frames we track - how the scorecard works · full bmx frames data report. Confidence: limited - limited rating history.Last refreshed Jun 21, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A bare BMX racing frame, not a complete bike. Built from 6061-T6 aluminum with triple-butted, hydroformed tubes, weighing 4.05 lbs, sized for the Pro XL 21 inch top tube class.
Since this is frame only, buyers need to already own or plan to build up wheels, a fork, brakes, and drivetrain. The B52 oversized bottom bracket includes an adapter for different crank standards, and the tapered 42/52 head tube accepts a fork with a 1 1/8 inch upper and 1.5 inch lower steerer for stiffer front-end steering.
- 21 inch top tube, Pro XL size
- Tapered 42/52 integrated head tube
- 140mm disc brake mount
- Integrated chain tensioners
Who it's for
Suits racers or builders assembling a custom BMX race bike who want a specific frame geometry and material spec rather than a stock complete bike. Not for anyone wanting a ready-to-ride bicycle out of the box.
Strengths and trade-offs
Drawn from this product's published specifications.
- Lightweight 4.05 lb 6061-T6 aluminum frame
- B52 bottom bracket adapts to multiple crank standards
- Works with 10/15/20mm rear hubs
- Frame only, no fork, wheels, or drivetrain included
- No listed rating or review history to check
Performance notes
The triple-butted, hydroformed aluminum tubing is intended to shave weight while keeping strength at stress points, and the tapered head tube stiffens the front end for sprint starts and cornering. Rear hub compatibility spans 10, 15, and 20mm axles with built-in chain tensioners, so the frame can match several hub standards without an adapter.
Specifications
| Brand | Syndyt |
|---|---|
| Model | SY-BF24210-BL |
| Color | Blue |
| Item Weight | 4.05 pounds |
| Size | 21 inches |
| Included Components | (1) Syndyt 210 Pro XL BMX Racing Bike Frame, B52 Bottom Bracket Adapters, 10mm and 15mm Axle Adapter Sets, 20mm Washers, Cable Port Inserts |
Other Syndyt bmx frames
How it compares
This product against the closest alternatives we track in bmx frames.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Syndyt 210 Pro XL BMX Racing Bike FrameThis product | - | - | 2.7 / 5 |
| Sunday Park Ranger BMX FrameSunday | - | - | 2.7 / 5 |
| Carbon Freestyle Frame 24er and Fork 24'' Max 49T Crankset | - | - | 2.7 / 5 |
| 20" 451 BMX Frameset with Bike Fork Carbon Fiber Road Bike Frame Thru Axle Front 12×100mm…Yfgsfwts | - | - | 2.7 / 5 |
| 451 BMX Bike Frame 42cm 44cm C Brake Bikes Frame Cr-Mo Steel Bike Frameset 100/130mm…Hwevdhj | - | - | 2.7 / 5 |
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Questions about the Syndyt SY-BF24210-BL
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Syndyt 210 Pro XL come with wheels or a fork?
No, this listing is for the frame only; wheels, fork, brakes, and drivetrain are sold separately.
What crank standards fit the B52 bottom bracket?
The B52 oversized bottom bracket ships with an adapter so it can accept multiple crank standards.
What size fork does the frame need?
It uses a tapered 42/52 integrated head tube, which takes a fork with a 1 1/8 inch upper and 1.5 inch lower steerer.