fit

Alpha X now comes standard with Tilt Hardware and Ergo Cups! The guide below reflects installation with the Tilt Hardware. For the older guide for legacy parts (without tilt), Click Here.

This page is a dynamic tool that will show you the stack/reach of the Alpha X on YOUR particular bike. This Guide can help you replicate your current bike position on the Alpha X, or set up a new bike with the Alpha X based on numbers from a bike fitter. This Guide contains a database of the stack/reach numbers for most modern triathlon bicycle frames, as well as the actual stack/reach numbers for the Alpha X. The Guide combines these numbers to produce a chart of actual X/Y coordinates of your pads measured from the bottom bracket. This coordinate is the most important number that bike fitters use to determine your position on a triathlon bike. The steps below provide an easy-to-follow system for making sure you have the perfect fit with the Alpha X aerobar.







Step 1: Determine your current fit numbers Show instructions »

Step 2: Select your bike

Use the form below to pick your bike model. If your bike isn't in the list, you can input the frame geometry directly in the "Stack" and "Reach" fields. If you leave these blank, the fit chart will show the stack/reach information for the Alpha X alone.

Brand:

Model:

Size:

Frame Stack (to Headset):

Frame Reach (to Headset):

Step 3: Find your position on the chart Show instructions »

Pad Stack
(BB to Top of Pad)
 
175mm 50mm Pad Spacers,
40mm Stem Spacers
       
170mm 45mm Pad Spacers,
40mm Stem Spacers
       
165mm 40mm Pad Spacers,
40mm Stem Spacers
50mm Pad Spacers,
30mm Stem Spacers
     
160mm 35mm Pad Spacers,
40mm Stem Spacers
45mm Pad Spacers,
30mm Stem Spacers
     
155mm 30mm Pad Spacers,
40mm Stem Spacers
40mm Pad Spacers,
30mm Stem Spacers
50mm Pad Spacers,
20mm Stem Spacers
   
150mm 25mm Pad Spacers,
40mm Stem Spacers
35mm Pad Spacers,
30mm Stem Spacers
45mm Pad Spacers,
20mm Stem Spacers
   
145mm 20mm Pad Spacers,
40mm Stem Spacers
30mm Pad Spacers,
30mm Stem Spacers
40mm Pad Spacers,
20mm Stem Spacers
50mm Pad Spacers,
10mm Stem Spacers
 
140mm 15mm Pad Spacers,
40mm Stem Spacers
25mm Pad Spacers,
30mm Stem Spacers
35mm Pad Spacers,
20mm Stem Spacers
45mm Pad Spacers,
10mm Stem Spacers
 
135mm 10mm Pad Spacers,
40mm Stem Spacers
20mm Pad Spacers,
30mm Stem Spacers
30mm Pad Spacers,
20mm Stem Spacers
40mm Pad Spacers,
10mm Stem Spacers
50mm Pad Spacers,
0mm Stem Spacers
130mm 5mm Pad Spacers,
40mm Stem Spacers
15mm Pad Spacers,
30mm Stem Spacers
25mm Pad Spacers,
20mm Stem Spacers
35mm Pad Spacers,
10mm Stem Spacers
45mm Pad Spacers,
0mm Stem Spacers
125mm 0mm Pad Spacers,
40mm Stem Spacers
10mm Pad Spacers,
30mm Stem Spacers
20mm Pad Spacers,
20mm Stem Spacers
30mm Pad Spacers,
10mm Stem Spacers
40mm Pad Spacers,
0mm Stem Spacers
120mm Slammed Tilt Spacer,
40mm Stem Spacers
5mm Pad Spacers,
30mm Stem Spacers
15mm Pad Spacers,
20mm Stem Spacers
25mm Pad Spacers,
10mm Stem Spacers
35mm Pad Spacers,
0mm Stem Spacers
115mm 25mm Pad Spacers,
40mm Stem Spacers
0mm Pad Spacers,
30mm Stem Spacers
10mm Pad Spacers,
20mm Stem Spacers
20mm Pad Spacers,
10mm Stem Spacers
30mm Pad Spacers,
0mm Stem Spacers
110mm 20mm Pad Spacers,
40mm Stem Spacers
Slammed Tilt Spacer,
30mm Stem Spacers
5mm Pad Spacers,
20mm Stem Spacers
15mm Pad Spacers,
10mm Stem Spacers
25mm Pad Spacers,
0mm Stem Spacers
105mm 15mm Pad Spacers,
40mm Stem Spacers
25mm Pad Spacers,
30mm Stem Spacers
0mm Pad Spacers,
20mm Stem Spacers
10mm Pad Spacers,
10mm Stem Spacers
20mm Pad Spacers,
0mm Stem Spacers
100mm 10mm Pad Spacers,
40mm Stem Spacers
20mm Pad Spacers,
30mm Stem Spacers
Slammed Tilt Spacer,
20mm Stem Spacers
5mm Pad Spacers,
10mm Stem Spacers
15mm Pad Spacers,
0mm Stem Spacers
95mm 5mm Pad Spacers,
40mm Stem Spacers
15mm Pad Spacers,
30mm Stem Spacers
25mm Pad Spacers,
20mm Stem Spacers
0mm Pad Spacers,
10mm Stem Spacers
10mm Pad Spacers,
0mm Stem Spacers
90mm 0mm Pad Spacers,
40mm Stem Spacers
10mm Pad Spacers,
30mm Stem Spacers
20mm Pad Spacers,
20mm Stem Spacers
Slammed Tilt Spacer,
10mm Stem Spacers
5mm Pad Spacers,
0mm Stem Spacers
85mm   5mm Pad Spacers,
30mm Stem Spacers
15mm Pad Spacers,
20mm Stem Spacers
25mm Pad Spacers,
10mm Stem Spacers
0mm Pad Spacers,
0mm Stem Spacers
80mm   0mm Pad Spacers,
30mm Stem Spacers
10mm Pad Spacers,
20mm Stem Spacers
20mm Pad Spacers,
10mm Stem Spacers
Slammed Tilt Spacer,
0mm Stem Spacers
75mm     5mm Pad Spacers,
20mm Stem Spacers
15mm Pad Spacers,
10mm Stem Spacers
25mm Pad Spacers,
0mm Stem Spacers
70mm     0mm Pad Spacers,
20mm Stem Spacers
10mm Pad Spacers,
10mm Stem Spacers
20mm Pad Spacers,
0mm Stem Spacers
65mm       5mm Pad Spacers,
10mm Stem Spacers
15mm Pad Spacers,
0mm Stem Spacers
60mm       0mm Pad Spacers,
10mm Stem Spacers
10mm Pad Spacers,
0mm Stem Spacers
55mm         5mm Pad Spacers,
0mm Stem Spacers
50mm         0mm Pad Spacers,
0mm Stem Spacers
  Pad Reach (BB to Pad Center)
Pads: +20mm » 108mm 111mm 114mm 117mm 120mm
Pads at Center » 88mm 91mm 94mm 97mm 100mm
Pads: -20mm » 68mm 71mm 74mm 77mm 80mm
  All reach numbers above are measured to the center of the pad. Some fit systems measure to the back of the pad instead. Our Ergo Cups are 115mm long, so subtract 60mm from the reach numbers above for back-of-pad fit numbers.

Our Ergo Cups are much longer than many other arm cups on the market. Therefore, if the reach numbers above do not match your desired fit perfectly, small differences (10-20mm) may be negligible.













  Blue Cells » Standard hardware, extensions above bar. Geometry includes integrated BTA mount.
  Red Cells » Slammed Tilt Spacer hardware, extensions above bar. Geometry includes integrated BTA mount.
  Green Cells » Undermount hardware, extensions below bar. Geometry excludes integrated BTA mount.