Carbon Racing Shoes Aren't Just For Marathons Anymore
Most runners think of full carbon plate racing shoes as exclusively marathon race day weapons. But what if the same ultra-light performance that makes them great for marathons also makes them your best possible shoe for speed workouts, track intervals, and tempo runs?
That's what we discovered when we took the IRUNSVAN CHASING LIGHT 1.0 to the track for eight weeks of speed sessions. This 269g ultra-light carbon marathon shoe quickly became our favorite shoe for doing everything from 400m repeats to 10K tempo efforts. In this post, we'll break down why it's one of the most versatile speed training carbon shoes we've ever used.
The Ultra-Light Weight Makes Track Intervals Feel Effortless
When you're doing 12x400m repeats at 5K pace, every extra ounce on your feet adds up really fast. Your feet have to turnover quickly hundreds of times per session. The 269g weight of the CHASING LIGHT 1.0 makes those fast interval repetitions feel shockingly easy.
During a recent 8x1 mile interval session at 6:00/mile pace, we noticed our cadence jumped 5-7 steps per minute automatically, just because the shoes were so light. No extra effort, no heavy feet dragging at the end of the workout. Our legs were far less fatigued after 8 miles of hard intervals than when we wore our regular track spikes for the same workout.
The low weight completely transforms speed sessions.
M85 Carbon Plate Delivers Sharp Pop For Every Sprint
The stiff M85 high-modulus carbon plate gives you sharp, snappy toe-off on every single interval rep. There's zero lag, zero softness. When you explode out of the blocks for a hard 200m repeat, the plate launches you forward with immediate crisp propulsion.
Unlike softer full carbon shoes that feel mushy at sub-5K pace, CHASING LIGHT 1.0 is stiff enough to be responsive even at sprint speeds. It's not as extreme as a dedicated track spike, but it gives you far more forward assistance than any traditional lightweight training flat.
For tempo runs at half marathon pace, that plate consistency is equally impressive. It maintains its snappy performance through a full 10K tempo effort, no deadening mid-run, no loss of pop late in the session.
Thin Breathable Upper Eliminates Overheating On The Track
When you're doing hard interval sessions on a sunny track in 70°F+ weather, your feet get hot extremely fast. Thick multi-layer uppers will leave your feet soaked in sweat by the 4th repeat.
CHASING LIGHT 1.0's ultrathin AIR-LIGHT mesh upper solves that problem completely. The air flows freely across your entire foot, even when your heart rate is maxed out and you're sweating hard. Your feet stay cool and dry through the entire 90-minute track session. No soggy socks, no blisters, no discomfort. We've never tested a carbon plate shoe that breathes better during hard track efforts.
The Outsole Works Perfectly On Synthetic Tracks
We were initially worried that the CHASING LIGHT 1.0 road-specific outsole wouldn't perform well on synthetic rubber running tracks, but it surprised us. The multi-directional fine lug pattern bites reliably on modern synthetic track surfaces, delivering all the traction you need for interval work. There's zero slipping during fast cornering on the track oval.
You don't need metal spikes to get great traction for 5K, 10K, and even mile repeats. The CHASING LIGHT 1.0's outsole is more than grippy enough for 99% of non-elite track sessions, and it's far more comfortable to run in than spiked flats for warmup and cooldown miles.
Perfect Dual-Use Shoe – Track And Road
The best part of all this performance on the track? You don't need two separate pairs of shoes. You can do your speed intervals on the track in CHASING LIGHT 1.0, then do your tempo runs on the road, then line up for your half marathon on race day – all in the exact same pair of shoes.
Instead of having three different racing shoes taking up space in your gear closet, you can just use this one ultra-light full carbon plate shoe for everything fast. That versatility makes it an incredible value.
Final Thoughts: Speed Workouts Never Felt Easier
After eight weeks of speed training in the CHASING LIGHT 1.0, we can confidently say this isn't just a marathon shoe – it's one of the best carbon plate shoes for speed and interval training currently on the market. If you're a runner who does regular track sessions, tempo work, and road races, it's an incredibly versatile tool that will make every fast workout feel faster and easier.
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