Good to know: Integrated cockpit · Configurable build
Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.
Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.
Geometry ?
Isaac Meson RC 2027 geometry in sizes XS–XL: stack 498.5–582.7 mm, reach 373.3–399 mm, head angle 71.5–74°.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Stack | 498.5 mm | 522.9 mm | 544.2 mm | 564.7 mm | 582.7 mm |
| Reach | 373.3 mm | 379.4 mm | 384.4 mm | 392.3 mm | 399 mm |
| Head angle | 71.5° | 74° | 73.3° | 73.2° | 73.3° |
| Seat angle | 74.5° | 74° | 73.5° | 73° | 73.5° |
| Seat tube (c-t) | 447.7 mm | 474.8 mm | 505.4 mm | 531.9 mm | 564.1 mm |
| Head tube | 91 mm | 114 mm | 133.4 mm | 155 mm | 176 mm |
| Top tube (effective) | 511.6 mm | 529.3 mm | 545.6 mm | 565 mm | 571.6 mm |
| BB drop | 74 mm | 74 mm | 71.5 mm | 71.5 mm | 69 mm |
| Chainstay | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 970.3 mm | 977.8 mm | 974.8 mm | 989.4 mm | 1001.6 mm |
| Standover | 746.3 mm | 773.2 mm | 794.6 mm | 813.2 mm | 834.3 mm |
| Fork length | 372 mm | 372 mm | 372 mm | 372 mm | 372 mm |
| Fork offset | 49 mm | 49 mm | 43 mm | 43 mm | 43 mm |
Source: isaac-cycle.cz, checked 2 Nov 2026 · bar position: worked out from published data
Stock build
Meson RC Shimano 105 Di2 ≈ €5,300
- Groupset
- Shimano 105 Di2 2×12
- Shifters
- Shimano 105 Di2 ST-R7170
- Cranks
- Shimano 105 Di2 (52/36, 170 mm stock; 165/170/172.5)
- Stem
- integrated
- Handlebar
- ISAAC Airflow Carbon
- List price
- 132,490 CZK (isaac-cycle.cz, 2 Nov 2026)
Meson RC Shimano Ultegra Di2 ≈ €6,100
- Groupset
- Shimano Ultegra Di2 2×12
- Shifters
- Shimano Ultegra Di2 ST-R8170
- Cranks
- Shimano Ultegra Di2 (52/36, 170 mm stock)
- Stem
- integrated
- Handlebar
- ISAAC Airflow Carbon
- List price
- 152,490 CZK (isaac-cycle.cz, 2 Nov 2026)
Meson RC Shimano Dura-Ace Di2 ≈ €7,500
- Groupset
- Shimano Dura-Ace Di2 2×12
- Shifters
- Shimano Dura-Ace Di2 ST-R9270
- Cranks
- Shimano Dura-Ace Di2 (52/36, 170 mm stock)
- Stem
- integrated
- Handlebar
- ISAAC Airflow Carbon
- List price
- 187,490 CZK (isaac-cycle.cz, 2 Nov 2026)
Options when ordering (manufacturer’s default in bold):
| Size | Stem | Bar width |
|---|---|---|
| all | 90, 100, 110, 120 mm | 380, 400, 420 mm |
Source for all builds: isaac-cycle.cz, checked 2 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size XS (stack 498.5 / reach 373.3 mm).
Stack and reach within 12 mm of size S (stack 522.9 / reach 379.4 mm).
Stack and reach within 12 mm of size M (stack 544.2 / reach 384.4 mm).
Stack and reach within 12 mm of size L (stack 564.7 / reach 392.3 mm).
Stack and reach within 12 mm of size XL (stack 582.7 / reach 399 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 6 values for this model’s stem and bars. Add them