16-17C inner width
19 mm
Narrow road and gravel rims. The tape sits controlled without climbing the side wall.
Size guide
Measure inner width. Choose GLUY width.
The key purchase decision is not the calculator, but the right width. GLUY uses a fixed width table for your rim inner width.
Width calculator
Inner width + 2 to 3 mm. That is the fit.
Measure the rim between the inside faces of the rim hooks. GLUY maps that value to a fixed set width and opens the purchasable variant.
01 Measure
Rim inner width
Not outside width, not tyre width. The clear inner width in the rim bed is what matters.
02 Calculate
+ 2-3 mm
Example: 18-19 mm inner width becomes 21 mm GLUY width.
03 Buy
Open the variant
The CTA sets the matching Shopify variant by URL parameter and jumps to the buybox.
+ 2-3 mm rule
If your rim lists inner width as 23C, 25C or 30C, use that number. 28C remains a support case instead of a guessed fit.
Quick select
✓
GLUY recommendation
Match from the GLUY width table.
Calculation
22-23 mm inner width -> 25 mm GLUY width
The button jumps to the buybox and sets the variant through the URL parameter "Felgengröße".
Recommended
25 mm
Purchasable GLUY width.
Purchasable widths
19 mm / 21 mm / 23 mm / 25 mm / 27 mm / 29 mm / 32 mm
Examples
How to read the rim.
20-21C inner width
23 mm
The usual all-round range for modern road and gravel wheels.
22-23C inner width
25 mm
More rim bed, more contact. The GLUY width table remains the starting point.
26-27C inner width
29 mm
Wider gravel and adventure rims need more controlled width.
29-30C inner width
32 mm
For wide rims where the tape must cover the bed contour cleanly.