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

New for 2002
The 2002 version of the XO-1 is all new. New tubeset
with round oversized downtube, new fastback-style seatstays,
new sizes with wider size range and new geometry.
Geometry
The XO-1 is a true cyclocross frame, and the new 2002
version is more racing oriented than in the past. It has
quicker steering response for technical terrain, with a
lower bottom bracket for easier mounts and a lower
center of gravity. Compared to a regular road bike, it
has a longer wheelbase, more relaxed head angle, and
higher bottom bracket.
We used a traditional, high seat cluster design, and
moved the cables to the top of the top tube (although
there is cable routing for a down-pull front derailleur if
so desired). This design leaves lots of room to shoulder
the XO-1 on run-ups.
In addition to the centerline geometry, we’ve also
looked from the other perspective. This frame has tons
of tire clearance.
Ride
The steering geometry and wheelbase provide a stable
ride off pavement. The higher bottom bracket (relative
to a regular road bike) means more pedaling clearance
in ruts or on sidehills. Increased tire clearance means
less speed-robbing mud clogs. A ‘Cross racer knows all
this means better placing in races. It also makes the
XO-1 a great all-round road bike capable of accepting
both large tires and fenders for winter training, commuting,
or touring.
Frame details
The XO-1 uses Trek’s proprietary Alpha SL frame tubing.
An oversize down tube creates a rigid structure
between the bottom bracket and head tube, for frame
stiffness and strength when you’ve left the pavement.
Speaking of frame strength, we even added a big butterfly
gusset under the head tube.
The head tube is butted, with a thin mid-section for
low weight, but heavy duty walls to support the headset
cups.
Full top tube cable routing keeps the cables out of the
muck for friction free shifting and braking.
The fittings, like dropouts and seatstay yoke, on the
XO-1 are forged aluminum. Forging provides the highest
structural integrity, while the low density of the
aluminum keeps the bike light.
Although we chose to route the front derailleur on
the top tube, we thoughtfully included a cable guide for
traditional down tube cable routing. This allows you to
choose from either a mountain bike front derailleur with
top pull cabling, or a road bike derailleur which are only
available with down-pull styling. Why the difference?
Front derailleurs are designed to be used with specific
chainring tooth quantities. A road front derailleur won’t
work it’s best with smaller rings, and vice versa.
The XO-1 provides 2 water bottle mounts on all frame
sizes.
MILLIMETERS
INCHES
2002 Trek Technical Manual
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
Cyclo-Cross
50 52 54 56 58
71.0 71.0 71.5 72.0 72.5
74.5 74.0 73.5 73.0 73.0
763 775 791 805 824
500 520 540 560 580
97 97 105 105 123
515 525 540 555 565
430 430 430 430 430
281 281 281 281 283
45.0 45.0 45.0 45.0 45.0
74 74 71 68 64
30.0 30.5 31.1 31.7 32.5
19.7 20.5 21.3 22.0 22.8
3.8 3.8 4.1 4.1 4.8
20.3 20.7 21.3 21.9 22.2
16.9 16.9 16.9 16.9 16.9
11.1 11.1 11.1 11.1 11.1
1.8 1.8 1.8 1.8 1.8
2.9 2.9 2.8 2.7 2.5
93