Models · Rock Machine · Lukk
Rock Machine Lukk (alloy) (2026)
Geometry ?
Rock Machine Lukk (alloy) 2026 geometry in sizes S–XL: stack 585–623 mm, reach 357–384 mm, head angle 71°.
| S | M | L | XL | |
|---|---|---|---|---|
| Stack | 585 mm | 594 mm | 604 mm | 623 mm |
| Reach | 357 mm | 363 mm | 375 mm | 384 mm |
| Head angle | 71° | 71° | 71° | 71° |
| Seat angle | 73.5° | 73° | 73° | 72.5° |
| Seat tube (?) | 480 mm | 500 mm | 520 mm | 540 mm |
| Head tube | 150 mm | 160 mm | 170 mm | 190 mm |
| Top tube (effective) | 530 mm | 545 mm | 560 mm | 580 mm |
| BB drop | 65 mm | 65 mm | 65 mm | 65 mm |
| Chainstay | 435 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1019 mm | 1028 mm | 1044 mm | 1059 mm |
| Stock build by size | ||||
| Cranks | 170 mm | 170 mm | 170 mm | 170 mm |
| Stem | 80 mm | 80 mm | 80 mm | 80 mm |
| Stem angle | −8° | −8° | −8° | −8° |
| Bar width | 400 mm | 400 mm | 420 mm | 420 mm |
(?) by the seat tube length: the manufacturer doesn’t say whether it’s measured centre to centre (c-c) or centre to top (c-t).
Source: rockmachinebikes.com, checked 1 Nov 2026 · bar position: worked out from published data
An older model year in the archive with the same stack, reach and head angle: 2025. Source: rockmachinebikes.com
Stock build
Lukk 50
- Groupset
- Shimano CUES U6000 1×11 (42T)
- Shifters
- Shimano CUES ST-U6030-R / BL-U6030-L
- Cranks
- Shimano CUES FC-U6030-1 42T
- Stem
- ONE1 Alloy, 31.8 mm, −8°
- Handlebar
- One1 Compact
- Seatpost
- One1 Alloy 27.2
- Saddle
- Selle Royal Flex Tex SRX
Lukk 40
- Groupset
- microSHIFT Sword 1x (Prowheel Sword 46T)
- Shifters
- microSHIFT Sword
- Cranks
- Prowheel SWORD FC-G7000-46
- Stem
- ONE1 Alloy, 31.8 mm, −8°
- Handlebar
- One1 Compact
- Seatpost
- One1 Alloy 27.2
- Saddle
- Selle Royal Flex Tex SRX
Source for all builds: rockmachinebikes.com, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size S (stack 585 / reach 357 mm).
Stack and reach within 12 mm of size M (stack 594 / reach 363 mm).
Stack and reach within 12 mm of size L (stack 604 / reach 375 mm).
Stack and reach within 12 mm of size XL (stack 623 / reach 384 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 1 value for this model’s stem and bars. Add them