Good to know: Configurable build
Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.
Geometry ?
Isaac Kaon 2026 geometry in sizes S–XL: stack 567.1–625.7 mm, reach 381–417 mm, head angle 70.5–71°.
| S | M | L | XL | |
|---|---|---|---|---|
| Stack | 567.1 mm | 589.9 mm | 602.8 mm | 625.7 mm |
| Reach | 381 mm | 393 mm | 406.4 mm | 417 mm |
| Head angle | 70.5° | 71° | 71° | 71° |
| Seat angle | 73.5° | 73.5° | 73.5° | 73.5° |
| Seat tube (c-t) | 480 mm | 510 mm | 540 mm | 570 mm |
| Head tube | 130 mm | 150 mm | 170 mm | 190 mm |
| Top tube (effective) | 549 mm | 567.1 mm | 585 mm | 602.3 mm |
| BB drop | 74 mm | 74 mm | 72 mm | 74 mm |
| Chainstay | 435 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1032 mm | 1046.2 mm | 1068.9 mm | 1083.2 mm |
| Fork offset | 47.9 mm | 47.9 mm | 47.9 mm | 47.9 mm |
| Stock build by size | ||||
| Stem | 90 mm | 100 mm | 100 mm | 120 mm |
| Bar width | 400 mm | 420 mm | 420 mm | 440 mm |
Source: isaac-cycle.cz, checked 2 Nov 2026 · bar position: worked out from published data
Stock build
Kaon Shimano 105 ≈ €3,052
- Groupset
- Shimano 105 2×12
- Shifters
- Shimano 105 ST-R7120
- Cranks
- 50/34 172.5 mm stock (170/172.5/175)
- Stem
- Isaac
- Handlebar
- Isaac
- List price
- 76,290 CZK (isaac-cycle.cz, 2 Nov 2026)
Kaon Shimano 105 Di2 ≈ €3,752
- Groupset
- Shimano 105 Di2 2×12
- Shifters
- Shimano 105 Di2 ST-R7170
- Cranks
- 172.5 mm stock
- Stem
- Isaac
- Handlebar
- Isaac
- List price
- 93,790 CZK (isaac-cycle.cz, 2 Nov 2026)
Kaon Shimano GRX 610/820 2x12 ≈ €3,052
- Groupset
- Shimano GRX RX610/RX820 2×12
- Shifters
- Shimano GRX ST-RX610
- Cranks
- 46/30 172.5 mm stock
- Stem
- Isaac
- Handlebar
- Isaac
- List price
- 76,290 CZK (isaac-cycle.cz, 2 Nov 2026)
Options when ordering (manufacturer’s default in bold):
| Size | Stem | Bar width |
|---|---|---|
| all | 90, 100, 120 mm | 400, 420, 440 mm |
Source for all builds: isaac-cycle.cz, checked 2 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size S (stack 567.1 / reach 381 mm).
Stack and reach within 12 mm of size M (stack 589.9 / reach 393 mm).
Stack and reach within 12 mm of size L (stack 602.8 / reach 406.4 mm).
Stack and reach within 12 mm of size XL (stack 625.7 / reach 417 mm).
Spotted a mistake or a missing build? Let me know.