XCR

year size head angle seat angle chainstay bb height tt length wheelbase
1984 21" 72° 72° 17.5" 24" 42.8"
1986 21" 70.5° 70.5° 17.25" 11.75" 24.5" 42.25"
Introduced around 1983.

The XCR Composite frame - an aluminum main triangle with a bolt-on steel rear triangle - was perhaps the most influential of the Mantis designs. Gary Fisher licensed a version in around 1989 (same year as the 1.25" headset...), the CR-7. Like the X-Frame/Valkyrie, later replaced by an elevated chainstay variant (see below). Originally, the XCR was a brazed full-chromoly frame (Columbus stays, top tube, and seat tube, and a down tube of plain-gauge aircraft tubing) much like the Sherpa, but built as one of the first dedicated racing mountain bikes, as opposed to the more laid-back geometry of earlier Mantis bikes.

Articles:

MBA Jul 1986
picture, serial # description

X21011

21"


X19217

19"


X18418

18"
1987

WILEY COYOTE

1985
custom race frame for you-know-who

XCR-EC

year size head angle seat angle chainstay bb height tt length wheelbase
1989 18" 70.5° 72° 16.5" 22.5" 41"
Introduced around 1989.

Basically a standard XCR with design modifications to accomodate the elevated chainstay design that Richard helped popularize in the early 90s. Nishiki produced a version of this frame, the Alien ACX, which had box section tubes in the main triangle. I beleive Haro also produced a frame of this type as well? Some full-aluminum XCRs were built as race prototypes, but only a very few, and they never made it into production.
picture, serial # description


XCREC1

First XCR-EC made for the public, for the 1989? Interbike show


XCE19422

19"
~1989-91
original paint was Mantis blue


XCE13123

13"


XCE20723

20"


XCE18424

18"
~1993-94


XCE20324

20"
~1993-94


XCE18425

18"
~1993-94


XCE18525

18"
~1993-94


21 PROTO SON OF LORD OF SPHINCTER

~1993
full AL prototype frame

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