TECHNOLOGY STORIES BIKE INFO, GEOMETRY ... - Vintage Trek

New for 2002
The 2002 Alpha SL frame platform got
a style update; round oversized down tube
and traditional fastback seat stays. While
we like the traditional look, we're even
more excited about the increase in frame
rigidity and overall weight reduction.
Geometry
The geometry of the Alpha SL frame
stays as it was in 2001, a great all-round
road racing feel, but the update to the
tubeset shape increases its performance.
The Alpha SL geometry is very similar
to our OCLV frames. The major difference
is that the Alpha SL frames share the same
chainstay length, while the OCLV road
bikes vary by several millimeters. In other
words, there are full race design bikes.
The WSD models are adapted to fit and
perform better for women.
Ride
These frames are full race, providing
excellent frame rigidity and handling.
However, they are not overly harsh. Our
engineers designed the frame materials,
tubing diameters, and wall thicknesses to
ride like a classic race bike, and to avoid the teeth
rattling that some aluminum frame create.
Frame details
Alpha SL frames are 6061 T6 aluminum.
Alpha SL frames provide 2 water bottle mounts,
except the 43 and 47cm WSD frames which have seat
tubes which are too short.
Alpha SL cable routing uses downtube shift bosses for
compatibility with Shimano STI shifting. They use an
open brake cable under the top tube, leaving a clean
look. Although these frames are at home on the race
course, they are also great for more recreational riding.
We’ve added eyelets on the rear dropouts to provide
mounting points for a rack or fenders. This way, the
Alpha SL frames can be used for commuting or light
touring.
MILLIMETERS
INCHES
Alpha SL Road
Frame sizes
Head angle
Seat angle
Standover
Seat tube
Head tube
Eff top tube
Chainstays
BB height
Offset
Trail
Wheelbase
Standover
Seat tube
Head tube
Eff top tube
Chainstays
BB height
Offset
Trail
Wheelbase
2002 Trek Technical Manual
Alpha SL Road
50 52 54 56 58 60 63
72.0 72.5 73.0 73.8 73.8 74.0 74.0
75.0 75.0 74.0 73.0 73.0 73.0 72.5
740 754 768 788 806 825 854
500 520 540 560 580 600 630
97 97 105 123 140 159 189
521 526 544 560 571 580 601
417 417 417 417 417 417 417
266 266 266 268 268 268 270
47.0 47.0 47.0 43.0 43.0 43.0 43
61 58 55 54 54 53 53
988 989 993 994 999 1006 1021
29.1 29.7 30.2 31.0 31.7 32.5 33.6
19.7 20.5 21.3 22.0 22.8 23.6 24.8
3.8 3.8 4.1 4.8 5.5 6.2 7.4
20.5 20.7 21.4 22.1 22.5 22.8 23.7
16.4 16.4 16.4 16.4 16.4 16.4 16.4
10.5 10.5 10.5 10.5 10.5 10.5 10.6
1.9 1.9 1.9 1.7 1.7 1.7 1.7
2.4 2.3 2.1 2.1 2.1 2.1 2.1
38.9 38.9 39.1 39.1 39.3 39.6 40.2
MILLIMETERS
INCHES
Alpha SL Road WSD
Frame sizes
Head angle
Seat angle
Standover
Seat tube
Head tube
Eff top tube
Chainstays
BB height
Offset
Trail
Wheelbase
Standover
Seat tube
Head tube
Eff top tube
Chainstays
BB height
Offset
Trail
Wheelbase
43 47 52 54
73.0 72.5 72.5 72.5
76.0 75.0 74.0 74.0
683 708 751 763
430 470 520 533
97 97 133 97
488 499 504 525
412 412 412 417
262 264 264 266
38.1 38.1 38.1 47.0
55 58 58 58
950 956 954 978
26.9 27.9 29.6 30.0
16.9 18.5 20.5 21.0
3.8 3.8 5.2 3.8
19.2 19.6 19.8 20.7
16.2 16.2 16.2 16.4
10.3 10.4 10.4 10.5
1.5 1.5 1.5 1.9
2.2 2.3 2.3 2.3
37.4 37.6 37.6 38.5
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