Key takeaways
- An offwidth is a crack too wide to hand/fist jam but too narrow to chimney — the awkward in-between size.
- It requires whole-limb techniques: arm bars, chicken wings, heel-toe jams, knee locks.
- It's notoriously strenuous, technical, and uncomfortable.
- It's a love-it-or-hate-it niche of crack climbing that demands specific skills.
What an offwidth is
An offwidth is a rock crack of the dreaded in-between size — too wide to jam with hands or fists, but too narrow to fit your whole body inside and chimney. That awkward width is exactly what makes it one of the most strenuous and unintuitive types of crack climbing.
How to climb one
You wedge larger body parts against the crack walls using counter-pressure, inching upward:
- Arm bars — forearm against one wall, hand or elbow against the other.
- Chicken wings — a bent arm wedged into the crack.
- Heel-toe jams — the foot torqued across the crack.
- Knee locks — for wider offwidths.
Facing a crack too wide to hand-jam, a climber stuffs an arm in for an arm bar, sets a heel-toe jam with their foot, and grinds upward inch by inch — slow, sweaty, and skin-scraping work that the hand jam never demands.
Why it has a tough reputation
Offwidths are awkward, strenuous, hard to protect, and uncomfortable — the techniques are unintuitive and tiring, progress is slow, and they need specialized large protection (big cams or tube chocks). It’s a love-it-or-hate-it niche of crack climbing.
The bottom line
An offwidth is the crack-climbing size everyone dreads: too wide to jam, too narrow to chimney, demanding awkward, strenuous whole-limb techniques like arm bars, chicken wings, and heel-toe jams. Slow, uncomfortable, and hard to protect, it's a love-it-or-hate-it niche — but mastering the unintuitive offwidth skills unlocks routes most climbers can't touch.
Frequently asked questions
What is an offwidth?
An offwidth is a rock crack of an awkward in-between size — wider than your hands or fists (so you can't hand-jam it) but narrower than your body (so you can't fit inside and chimney it). This makes it one of the most awkward and strenuous types of crack to climb, requiring specialized whole-limb techniques.
How do you climb an offwidth?
You wedge larger body parts against the crack walls using counter-pressure: arm bars (forearm against one wall, hand/elbow against the other), chicken wings (a bent arm wedged in), knee locks, and heel-toe jams with the feet. You inch upward by alternately securing and advancing these holds. It's physically demanding, technical, and often slow, and it tends to chew up skin and clothing.
Why do offwidths have a tough reputation?
Because they're awkward, strenuous, hard to protect, and uncomfortable — the techniques are unintuitive and tiring, progress is slow, and they can be intimidating. Specialized large protection (big cams or tube chocks) is needed, and the whole experience is so distinctive that offwidth climbing is a niche pursuit that climbers either embrace as a unique challenge or actively avoid.
Sources
- Crack technique — American Alpine Club
- Climbing skills — The Mountaineers