8mm vs 12mm Heel Drop for Running: Which Is Better?

What 8mm and 12mm drop mean

Heel drop is the difference in height between the cushioning under your heel and the cushioning under your forefoot, measured in millimeters. An 8mm drop places your heel 8mm above your forefoot; a 12mm drop places it 12mm above. Both values sit in the moderate to high part of the running shoe range, and both are common in daily trainers. To understand how drop relates to total cushioning, see the guide to heel drop and stack height, and read about the sneaker drop ratio for a related way to compare models.

The drop angle controls how your foot is oriented when it first touches the ground and as it rolls forward. A higher drop holds the heel up and tips the toe down, which is why it pairs naturally with heel striking. A lower drop levels the foot out and makes a more forward landing feel easier to hold. Both are valid choices for most runners, and your own stride is the best guide.

Gait and landing pattern

Your foot strike is the first point of contact. With a 12mm drop, the heel is elevated enough that a heel strike feels aligned with the shoe's geometry. Runners who naturally land on the rearfoot often report a smoother heel-to-toe transition in a 12mm shoe. An 8mm drop sits closer to the ground and encourages more of a midfoot or forefoot strike for some runners, though it still offers enough rearfoot cushioning to accommodate heel strikers.

The drop also affects how far your foot lands relative to your hips. A higher drop can encourage a slightly longer stride and a more extended knee at contact, while a lower drop often brings the foot closer to the body and promotes a faster cadence. Neither is objectively better, but your individual gait and comfort matter. For more on foot strikes and pronation, see the pronation types guide.

Calf and Achilles load

Lower heel drops put the calf muscle and Achilles tendon under more stretch during running. This can build strength over time, but it can also aggravate tight calves or a sensitive Achilles. A 12mm drop reduces the stretch on the lower leg and is often recommended for runners with Achilles or calf issues. OrthoInfo, the patient education resource from the American Academy of Orthopaedic Surgeons, notes that calf and foot conditions can be influenced by footwear and that gradual changes are safer than sudden ones.

If you have been running in a 12mm shoe for years, a sudden switch to 8mm can load the calf more than it is used to. The reverse is also true: moving from 8mm to 12mm can shift strain from the calf to the knee and front of the hip. Transition over several weeks, as your tissues adapt. Related advice appears in the zero-drop vs 4mm drop guide, which explains the same principle for even lower drops.

Comfort and cushioning

Drop is separate from total stack height, which is the sum of heel and forefoot cushioning. A shoe can have a 12mm drop with a modest stack or a tall stack, and the same is true for 8mm. Runners who like a soft landing under the ankle often prefer the extra heel cushion that a 12mm drop usually accompanies. Those who want a firmer, more connected feel under the midfoot often enjoy the lower profile of an 8mm shoe.

Comfort also depends on the midsole foam, the shape of the rocker, and the fit of the heel counter. A well-cushioned 8mm shoe can be more comfortable than a firm 12mm model. Your best bet is to try both drops in the same brand or within a single line to isolate the effect. For guidance on cushioning materials, see the cushioning materials guide.

Who should pick which drop

A 12mm drop is a sensible first choice for runners who heel strike and want a plush landing, or for those who have tight calves and want to ease the stretch on the lower leg. It is also common in daily trainers from brands like Brooks and New Balance. An 8mm drop fits runners who strike more toward the midfoot, who want a slightly more natural foot position, or who have knee pain and want to shift load away from the kneecap.

Runners with a history of Achilles tendinopathy or plantar fasciitis should be cautious about lowering the drop too quickly. The American Academy of Orthopaedic Surgeons advises gradual changes in activity and footwear to avoid overuse injuries. If you are unsure, start with a moderate range and listen to your body. For a broader look at drop options across many models, see the guides to best running shoes, best Brooks sneakers, and best Hoka sneakers.

How to make the switch

If you decide to move from 12mm to 8mm, do it gradually. Run one or two easy runs per week in the lower drop shoe, then increase the distance over two to three weeks. The same applies for moving up to 12mm. Pay attention to your calves, Achilles, and knees during the transition. If any discomfort persists, step back to the drop you were using and consult a professional.

Remember that drop is just one part of the fit. The overall fit of the shoe, including the toe box and the heel hold, matters just as much. Read how sneakers should fit to make sure the rest of the shoe works for you.

What to pick for your running style

Questions

Is a 12mm drop bad for your knees?

A 12mm drop is not bad for your knees. It can increase the load on the kneecap for some runners, but many others run comfortably in it. If you have knee pain, an 8mm drop may reduce stress on the kneecap. Listen to your body and consider a gradual transition.

Does 8mm drop cause Achilles injuries?

An 8mm drop does not cause Achilles injuries by itself, but it does place more stretch on the calf and Achilles than a 12mm drop. If you have a history of Achilles issues, transition slowly and consider a higher drop. The American Academy of Orthopaedic Surgeons recommends gradual changes in footwear to avoid overuse injuries.

What is the best heel drop for a beginner runner?

Most beginners adapt well to either 8mm or 12mm. If you naturally heel strike, a 12mm drop often feels smoother. If you do not know your strike pattern, try both and choose the one that feels easiest on your calves and knees. The shoe deals page lists running models in both drops.

Can I use an 8mm drop shoe for walking as well as running?

Yes, an 8mm drop is fine for walking, but if you have tight calves, a 12mm drop can be more comfortable for walking all day. For walking-specific advice, see the sneaker drop for walking guide.

How do I measure the drop of my current shoe?

You can measure the stack height at the heel and forefoot with a ruler, then subtract the forefoot number from the heel number. That difference is the drop in millimeters. Many brands also list the drop in the product specifications. For a step-by-step, see heel drop measurement.