Rayons is made and published by Timothy P Miller. AppBrain is an independent app data site and isn't affiliated with Timothy P Miller. The app name, icon, screenshots and description belong to Timothy P Miller and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- December 13, 2025
- Size
- 3.32 MB
User feedback
Ratings and reviews on the App StoreComments on Rayons for iOS
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Store listing
By Timothy P Miller, from the App Store
Description by Timothy P Miller Written by the developer, not by AppBrain. Click to read.
The app uses simple and accurate controls to input your measurements. The spoke length for your wheel set is displayed in real-time.
You can save the calculation in the app as a wheel set by typing in a text field and giving it a name.
Formula
The spoke length formula used by the Rayons app has a set of limitations based on the mathematics and the nature of the drawings. The formula was designed for use on conventionally laced wheels with j-bend spokes. These types of wheels are most commonly custom made by hand. The limitations outlined here may not be all inclusive.
A wheel has:
An even number of spokes
The same number of spokes on each side of the wheel
Equal spacing between spoke holes, on the rim or the hub
Spokes that are crossed in pairs on each side of the wheel which dictates a spoke count divisible by four
App Minimum and Maximum Dimensions
The Rayons app can be used to calculate spoke lengths for a variety of component types. This covers the majority of Road, Track, Mountain Bike, Touring, Tandem, Fat Bike, Downhill, Generator and Internally Geared wheels. At this time, the app is not recommended for use with E-Bike components. Check your component dimensions and compare them with this chart. Be sure the component dimensions are supported by the app. Read the Terms of Service for more information.
All of the values are in millimeters.
Front Hub Flange Diameter Minimum: 28
Front Hub Flange Diameter Maximum: 150
Front Hub Offset Minimum: 15
Front Hub Offset Maximum: 48
Rear Hub Flange Diameter Minimum: 35
Rear Hub Flange Diameter Maximum: 150
Rear Hub Left Offset Minimum: 20
Rear Hub Left Offset Maximum: 60
Rear Hub Right Offset Minimum: 10
Rear Hub Right Offset Maximum: 52
Hub Spoke Hole Diameter Minimum: 1.5
Hub Spoke Hole Diameter Maximum: 3.0
Effective Rim Diameter (ERD) Minimum: 300
Effective Rim Diameter (ERD) Maximum: 700
Rim Spoke Offset Minimum: 0.0
Rim Spoke Offset Maximum: 5.0
Fat Bike Rim Spoke Offset Minimum: 0.0
Fat Bike Rim Spoke Offset Maximum: 20.0
Counts
Minimum Number of Spokes: 12
Maximum Number of Spokes: 48
Minimum Number of Crosses: 0
Maximum Number of Crosses: 4
Safety and technology
Found in the app by AppBrain- Price
- $4.99
- App size
- 3.32 MB
- Content rating
- Everyone
Technologies used by Rayons
Releases
Updates seen on the App Store- Version
- 1.5.5
- Launched
- December 2020
No changelog data
Alternatives
Similar apps and more from Timothy P MillerAlternatives to Rayons
Rankings
App Store top chartsApp Store Rankings for Rayons
About the app and developer
About Rayons
Rayons is an utilities app developed by Timothy P Miller.
What is the rating of Rayons?
Rayons has no ratings yet.
Is Rayons free?
Rayons costs $4.99. The app size is 3.32 MB. The latest version available is 1.5.5. The last update was on December 13, 2025.
What are the requirements for Rayons?
The app has a content rating of Everyone. The app has been available on the App Store since December 2020.
Developer information for Timothy P Miller
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Frequently asked questions about Rayons
Is Rayons free?
No. Rayons costs $4.99 on the App Store.
Is Rayons still available?
Yes. Rayons is on the App Store, and the last update we saw was on December 13, 2025.
How large is Rayons?
Rayons is 3.32 MB.
Is Rayons suitable for children?
App Store rates the content of Rayons as suitable for everyone.
Who made Rayons?
Rayons was developed by Timothy P Miller. It is listed in the utilities category on the App Store.
What are the best alternatives to Rayons?
People looking at Rayons also look at these utilities apps: Cooking Conversions, EFX Mobile, Decibel X PRO: dBA Noise Meter, WSwitch for WeMo, NAD OSD.