Your Lightning: A Custom Fit
Taking the measurements
For correct frame sizing, up to four measurements are needed:
- Height
- Weight (Note: Weight limits apply to both seat and frame. Weight limit is for the rider only, an additional 50 pounds can be carried on a rear rack)
- Ex-seam (see diagram below). Measure with your riding shoes on.
- Inseam, measured standing up and barefoot, from crotch to floor.
Phantom
- Use the Height to determine the Seat Size. Normally this will be the same as the frame size.
- Use the Ex-seam dimension to determine the Frame Size.
| Size | Rider Height | Ex-seam | Rider Weight Limit |
|---|---|---|---|
| Small | 5′ to 5′9″ | 37 to 42″ | 200 pounds |
| Large | 5′7″ to 6′6″ | 41″ to 47″ | 250 pounds |
P-38, F-40, and R-84
These models are available in three or four frame, seat, and stem sizes. The seat and stem interchange with different size frames for a custom fit.
Note: Only the P-38 is available in a small size.
- Use the Height to determine the Seat Size.
- Use the Ex-seam dimension to determine the Frame Size.
- Use the Inseam dimension to determine the Stem Size.
| Frame, seat and stem size | Rider Height | Ex-seam | Inseam | Rider Weight Limit |
|---|---|---|---|---|
| Small | 4′9″ to 5′3″ | 35 to 38″ | 23 to 27″ | 160 pounds |
| Medium | 5′2″ to 5′8″ | 37.5 to 41″ | 26 to 30″ | 200 pounds |
| Large | 5′7″ to 6′1″ | 41 to 44.5″ | 29 to 33″ | 220 pounds |
| X-Large | 6′0″ to 6′6″ | 44 to 47.5″ | 32 to 36″ | 250 pounds |
Here’s how to determine the size of a P-38 frame:
| Frame size | Crank tube length |
|---|---|
| Small | 7 inches |
| Medium | 8 inches |
| Large | 9 inches |
| X-large | 10 inches |
Thunderbolt
The Thunderbolt was available in the following frame sizes:
| Size | Rider Height | Ex-seam | Rider Weight Limit |
|---|---|---|---|
| Small | 5′ to 5′10″ | 37 to 42″ | 220 pounds |
| Large | 5′8″ to 6′6″ | 42 to 48″ | 250 pounds |
Extended bottom bracket fitting
An extended bottom bracket is available for slim riders with a short torso and long legs.
This results in a lighter bike, since the next smaller frame size can be used. This option is not recommended for strong or heavy riders, as frame flex increases with the smaller sizes. Follow the directions above to determine the correct seat, frame, and stem size when the extended bottom bracket is used.
| Frame and Seat Size | Height | Ex-seam | Inseam | Stem Size |
|---|---|---|---|---|
| Small | 4′9″ to 5′3″ | 37 to 41″ | 25 to 30″ | Medium |
| Medium | 5′2″ to 5′8″ | 40 to 44″ | 28 to 33″ | Large |
| Large | 5′7″ to 6′1″ | 43 to 47.5″ | 31 to 36″ | X-Large |
| X-Large | 6′0″ to 6′8″ | 46 to 50.5″ | 34 to 39″ | XXL |
Note for bikes equipped with optional Tilt Steering: Because this option adds 2 inches to the total stem height, a smaller size stem should be used so that the handlebars do not end up too high. If you order a bike from the factory with the tilt steering option, we will automatically install the appropriate shorter stem. But for later upgrades or repair work, be sure to obtain the appropriate size stem. For example, a Large P-38 with tilt steering should have a medium stem.
P-38 forks
The following forks are available for the P-38. When replacement forks are ordered, please indicate the size, type, and brake mount.
| Size | Type | Brake Mount | Use |
|---|---|---|---|
| 16-inch | Rigid or Suspension | V Brake or Caliper | Small Frame, 16×1 or 1⅜ tire |
| 16×1⅜ | Rigid or Suspension | V Brake | Medium Frame, 16×1⅜ tire |
| 20×1 | Rigid or Suspension | Caliper (dual pivot) | Med/Large/XL Frame, 20×1 tire |
| 20-inch | Rigid or Suspension | V Brake | Large/XL Frame, 20×1.25 tire |
If you have any questions about all of this, give us a call!