TreadPacer

TreadPacer is a set of calculators for treadmill runners. Predict outdoor-equivalent pace and race times, estimate calories, convert treadmill speeds, plan splits, and more — all using science-based formulas (ACSM & Daniels).

Race Predictor

Add intervals (speed, incline, time or distance). We compute VO₂, convert to outdoor-equivalent pace, and predict race times using Daniels’ VDOT.

Adjust if you know your treadmill runs fast/slow.

At ≥9 km/h, 0% incline feels easier indoors. This raises flat runs to 1% to simulate air resistance. This will only show a difference if you are running at 0% incline.

# Speed (km/h) Incline (%) Duration (mm:ss) Action
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ASICS Megablast

The ASICS Megablast is one of the brand’s boldest innovations, designed as a high-stack performance trainer that bridges the gap between daily mileage shoe and racing model. It uses ASICS’ latest FF Turbo Squared foam, which is both lightweight and highly responsive, giving you excellent energy return without feeling overly soft.

With a heel stack of ~46 mm and a forefoot of ~38 mm (8 mm drop), it’s one of the tallest shoes on the market, yet the wide base and clever geometry make it surprisingly stable. At just over 8 oz, it’s lighter than many comparable high-cushion shoes. Reviewers highlight how versatile it is: you can take it out for long, steady runs and also push the pace for faster sessions without it feeling sluggish.

The engineered woven upper is breathable and flexible, though the forefoot fit may feel a touch narrow to some. The outsole coverage is strategic — not a full slab of rubber, but enough in high-wear zones to protect the foam. Durability appears solid, with runners reporting minimal wear even after 100+ miles.

Pros: Versatile across run types, highly responsive, lightweight for its cushioning, stable for a max-stack shoe.

Cons: Premium price, fit may be snug in the forefoot, outsole has less rubber than traditional trainers.

If you want a shoe that can do almost everything — long runs, daily mileage, and even faster workouts — the Megablast should be high on your list. It’s an investment, but one that could replace two or three shoes in your rotation.

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Adidas Adizero Adios Pro 4

The Adios Pro 4 is Adidas’ pinnacle racing shoe, built for chasing personal bests from 10K to the marathon. It features two layers of Lightstrike Pro foam combined with Adidas’ carbon-infused Energy Rods, which run the length of the shoe to create an efficient, propulsive ride. The result is one of the most aggressive yet balanced “super shoes” currently on the market.

The stack height pushes the World Athletics limit (around 39–40 mm at the heel), but clever sculpting and a rocker geometry deliver a smooth, rolling stride. At under 8 oz, the weight makes it easy to hold marathon pace without feeling heavy. Reviewers consistently note its ability to maintain performance late in long races when other shoes start to lose their pop.

The fit is snug and race-oriented, with a lightweight mesh upper and minimal padding. The outsole provides solid grip for both dry and wet roads, though like most racing shoes, durability is limited. It’s best saved for race day and key workouts rather than daily use.

Pros: Exceptional propulsion, lightweight, proven marathon pedigree, stable for a super shoe.

Cons: Very expensive, not built for everyday training, durability may be limited beyond 300–400 miles.

If you’re investing in one premium racing shoe for 2025, the Adios Pro 4 is a safe bet. It has been worn by elite marathoners and consistently delivers on speed, making it one of the best options for runners serious about racing.

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Hoka Clifton 10

The Hoka Clifton has long been one of the most popular cushioned daily trainers, and the Clifton 10 continues that tradition with subtle but meaningful updates. This version retains the lightweight, max-cushion DNA that made the line famous, while refining the ride for even better comfort and durability.

With a stack height around 30–32 mm at the heel and 25–27 mm at the forefoot (5 mm drop), it provides ample cushioning without feeling unstable. The midsole foam is slightly firmer than in older models, giving the shoe more responsiveness and making it better for longer runs where you don’t want to sink into the cushioning. The rocker geometry encourages a smooth transition, making the miles roll by easily.

The engineered mesh upper is breathable, and the shoe offers a secure midfoot fit with a roomy toe box. The outsole has improved rubber coverage compared to earlier Clifton models, which means better grip and longevity. Most reviewers find they can comfortably log hundreds of miles before noticing significant wear.

Pros: Plush cushioning, light for the category, smooth rocker ride, improved durability, great for recovery runs.

Cons: Not suited to fast workouts, high stack may feel slightly unstable on sharp turns, still a soft shoe compared to firmer trainers.

If you want a reliable daily trainer that prioritizes comfort, the Clifton 10 is hard to beat. It’s ideal for easy runs, long runs, and recovery days, and it has the durability to justify its price. For many runners, it’s the definition of an “easy choice.”

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Adidas Adizero Boston 12

The Adidas Adizero Boston 12 is a lightweight daily trainer that draws inspiration from Adidas’ racing line. Positioned between the everyday Adizero SL and the flagship Adios Pro, the Boston 12 is built for speed sessions, tempo runs, and long efforts where you want a fast feel without sacrificing comfort.

The shoe uses a dual-layer midsole of Lightstrike Pro for responsiveness and Lightstrike 2.0 EVA foam for stability and durability. Energy rods embedded in the midsole give extra propulsion, making each stride feel efficient and snappy. At around 37 mm heel / 30 mm forefoot (7 mm drop), the Boston 12 provides enough cushioning for long runs but still feels agile and connected to the ground.

The engineered mesh upper keeps the shoe breathable, while the Continental rubber outsole delivers excellent grip on both dry and wet surfaces. The fit is secure through the midfoot with enough room in the toe box for natural movement.

Pros: Lightweight, responsive, versatile for both speedwork and long runs, excellent grip.

Cons: Firmer feel than plush trainers, not as propulsive as the Adios Pro, price may be high for some.

The Adizero Boston 12 is ideal if you want a “do-it-all” performance trainer — a shoe that can handle workouts, tempo runs, and even race day, while still holding up for higher mileage. It’s a strong option for runners who want speed without committing to a carbon-plated racer.