Box One Prime 9 groupset
What the checker saysnot checked
No fit check runs on a complete bike, and we will not pretend one does. A complete bike does not fill a slot in the builder, so the checker has no counterpart to compare it against and has never produced a single sentence about one.
The checker compares the dimensions listed in what we check, and what we don’t. “No conflicts found” means no conflict among those dimensions — not a guarantee that a build works. Errors mean it won’t fit; warnings mean it works but check; infos are notes.
$477.66 to $496.71 MSRP
The maker’s build kit
The maker’s own component list, taken from the page linked below. Nothing on this list has been fit checked as a set.
One Prime 9
5 of 5 parts on this list are verified rows here and are linked.
- Shifter: Box Box One Prime 9 Multi Shift
- Rear Derailleur: Box Box One Prime 9 X-Wide
- Cassette: Box Box Three Prime 9 11-50
- Chain: Box Box Three Prime 9 126L
- Crankset: Race Face Aeffect R
Two Prime 9
5 of 5 parts on this list are verified rows here and are linked.
- Shifter: Box Box Two Prime 9 Multi Shift
- Rear Derailleur: Box Box Two Prime 9 X-Wide
- Cassette: Box Box Two Prime 9 X-Wide 11-50
- Chain: Box Box Two Prime 9 126L
- Crankset: Race Face Aeffect R
2 verified variants
| Variant | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|
| One Prime 9 | $496.71 | not stated | maker’s page | 2026-07-31 | Build with this |
| Two Prime 9 | $477.66 | not stated | maker’s page | 2026-07-31 | Build with this |
What the maker states1 stated
- Sold assembled.
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-31.