BH Expert geometryMTB · 2026 · 4 sizes, from XS to LA
The BH Expert is a mtb bike available in 4 sizes, from XS to LA. Stack ranges from 600.6 to 628 mm and reach from 380 to 435 mm. Its geometry is tall and short, built for comfort. All sizes share 435 mm chainstays.
What size Expert do I need?
Enter the stack and reach of a bike that fits you well and we will tell you which size is closest and how to set it up.
Enter your stack and reach to see which size fits you best.
Geometry chart by size
Measurements in mm and degrees, as published by BH. The ones that matter most for choosing a size are in bold.
| Size | XS | SM | MD | LA |
|---|---|---|---|---|
| Stack | 601 | 619 | 619 | 628 |
| Reach | 380 | 397 | 423 | 435 |
| Head tube length | 90 | 110 | 110 | 120 |
| Head angle | 68.5° | 68.5° | 68.5° | 68.5° |
| Chainstay length | 435 | 435 | 435 | 435 |
| Wheelbase | 1,070 | 1,091 | 1,121 | 1,136 |
| Front centre | 637 | 688 | 686 | 701 |
| BB drop | 60 | 60 | 60 | 60 |
| Fork length | 503 | 503 | 503 | 503 |
| Top tube (method not stated) | 552 | 580 | 607 | 622 |
| Seat tube (method not stated) | 350 | 400 | 440 | 480 |
| Seat angle (method not stated) | 74.0° | 73.5° | 73.5° | 73.5° |
Source: BH official website · data from 11 Nov 2026. Spot a mistake?
Stack and reach of every size
Higher means a taller front end; further right means a longer reach. The blue dot is your search.
Character of each size
Compared with other mtb bikes. Further right means more of that quality.
Bikes with similar geometry (size SM)
The closest size of other mtb models, by stack and reach.
Frequently asked questions
What size Expert do I need?
It depends on your position, not just your height. The most reliable way is to compare the stack and reach of a bike that fits you with those of each size (from 600.6/380 mm in size XS to 628/435 mm in size LA). The size finder on this page shows the closest size and the stem and spacers you would need.
What are the stack and reach of the Expert in size SM?
Stack of 619.2 mm and reach of 397 mm.
Is the Expert a racing or an endurance bike?
Endurance. In size SM its stack-to-reach ratio is at percentile 97 of mtb bikes: a tall, short position.