On gravel and field tracks, the maximum tire width that fits the frame determines comfort and traction. For the maximum tire width on gravel and field tracks for the folding bike, the criteria are: frame clearance, rim width, and mudguard clearance. The tire width for gravel on the folding bike should be as wide as the frame allows, without touching.
Measuring Frame Clearance
Measure the gap between the current tire and the frame, fork, and mudguards. For the frame clearance of the folding bike, a minimum of 5 mm on each side is recommended. With wider tires, the clearance shrinks.
| Position | Minimum clearance |
|---|---|
| Chainstays | 5 mm each side |
| Seatstays | 5 mm each side |
| Fork | 5 mm each side, 10 mm above |
| Mudguard | 10 mm |
Rim Width Compatibility
A wider tire needs a sufficiently wide rim. For the rim width for wide tires, the rule of thumb is: rim inner width should be about 50–70% of the tire width. A 2.0-inch (50 mm) tire needs a rim of at least 19–25 mm inner width.
Tire Width for Gravel and Field Tracks
For gravel, a tire width of 1.75–2.35 inches offers good comfort and traction. For the gravel tire width on the folding bike, wider tires with a moderate tread pattern work best. Check the maximum width the frame allows.
Retrofitting Wider Tires
Before retrofitting, check frame, fork, and mudguard clearance. For the retrofitting of wider tires on the folding bike, also check the brake clearance and the folding mechanism.
Frequently Asked Questions
How wide can the tires be on a folding bike?
Depends on the frame. Typically 2.0–2.35 inches for 20-inch folding bikes. Measure the clearance before purchasing.
What clearance is needed for wide tires?
At least 5 mm on each side to the frame and fork, 10 mm to the mudguard. More clearance is better for gravel.
Do wide tires help on gravel?
Yes, wider tires offer more traction and comfort on gravel. A moderate tread pattern helps. Check the frame clearance first.
Can I fit wider tires to any folding bike?
No. The frame and fork limit the maximum width. Measure before purchasing.
