CalculatorsFlip-Chip Geometry Calculator
Flip-Chip Geometry Calculator
Many trail frames ship a high and a low chip. This applies a typical delta — half a degree of head angle and 6 mm of bottom-bracket height — so you can see the low setting before you pull the pivot.
Inputs
Results
- Head angle
- 64.5 °
- BB height
- 13.2 in
The Result is indicative and educational. It does not constitute a design, a technical opinion or medical advice and does not replace calculations or verification by a person with the appropriate qualifications and authorisations. Before purchase, installation or use in practice – in particular in electrical installations – the Result should be verified by a qualified specialist. Details: Terms of Service, point 4.
How the number is made
Enter the high-position numbers from the geometry chart. High returns them unchanged. Low subtracts 0.5° from the head angle and 6 mm from BB height. Example: 65° and 340 mm → 64.5° and 334 mm in low. Your frame’s chip may differ; the manual wins.
A low chip rotates the whole frame, so the seat angle slackens by about the same 0.5°, reach shortens by a few millimetres and stack grows. This tool only shifts head angle and BB height.
Related calculators
- Stack and Reach Ratio Calculator
A chip rarely fixes a frame whose reach was wrong to start with.
- Rear Shock Spring Rate Calculator
If the chip changes leverage, the spring rate needs another pass.
Questions
Which chip for climbing?
High is usually steeper and taller: the steeper seat angle keeps your weight forward on a climb, and the higher BB clears pedals over rocks. Low is the descending setting.
Is every chip 0.5°?
No. Some are 0.6°, some also change reach. Use this as the typical case and your geometry PDF as the truth.
What does the low chip change?
The low position is a fixed minus 0.5 degrees of head angle and minus 6 mm of bottom-bracket height. High leaves the numbers you typed unchanged.
Example products
Product links are Affiliate Links to Amazon websites. Using them does not cost you anything extra, and if you make a purchase we may receive a commission. Details: Terms of Service, point 5.
- Torque wrench
Flip-chip bolts are small. A 3–15 Nm wrench keeps the threads in the link.
$40–$120