Eric Jones SX400 Moto Monster (1994) — Supercross BMX Heritage
Supercross BMX Heritage Collection · The Cro-Mo Years
Eric Jones SX400 Moto Monster
1994The XXXL frame built for AA Pro Eric Jones — who tried aluminum first and asked for cro-mo.
The first aluminum frame Supercross ever prototyped was an XXXL built for AA Pro Eric Jones. Eric rode it, preferred cro-mo — and the Moto Monster shipped as a chromoly XXXL instead.
The Story
Eric Jones was Supercross's AA Pro in 1994, and he needed a bigger frame than the line offered. Supercross built him the company's first-ever aluminum prototype in a new XXXL size. He preferred the feel of steel, so the production frame — the Moto Monster — was built in cro-mo, and the aluminum work fed directly into the AMX line that followed.
The Moto Monster was the first Supercross frame with a 22.5" top tube, paired with a 17" rear triangle and a 74.5° head angle. Cecil Johns and Eric Jones helped come up with the name. Eric left the team to move to Hawaii after a few good AA Pro wins, and the Moto Monster XXXL held its spot in the 1995 lineup alongside the full SX range.
Footnote in aluminum history: the rejected Eric Jones aluminum prototype was the seed of the AMX series — the frames that took Supercross into high-ceramic 6013 alloy.
Specifications
| Spec | Detail |
|---|---|
| Production year | 1994 |
| Material | 4130 chromoly |
| Top tube | 22.5 in — first Supercross frame at this length |
| Rear triangle | 17 in |
| Head angle | 74.5° |
| Size | XXXL |
| Seat post | 7/8 in (22.2 mm) post, 1 in (25.4 mm) clamp |
| Bottom bracket | American press-in |
| Built for | AA Pro Eric Jones |
| Named by | Cecil Johns and Eric Jones |
Who Raced It
Signature frame of 1994 AA Pro Eric Jones, who moved to Hawaii after a run of AA Pro wins.