Saris H3 vs. H4: Should You Upgrade?

Saris H3 on the left side vs. Saris H4 on the right side.

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Saris introduced Saris H4. It’s an upgraded version of their H3 smart trainer.

I’ve been using H3 and have already reviewed it. Unfortunately, I haven’t had a chance to test H4 yet because it was released just a few days ago.

So, in this article, I compare their features and will also try to help you decide if you should upgrade.

SPOILER ALERT: If you already have Saris H3 (or another mid to high-end smart trainer), I don’t think you should upgrade.

Continue reading to learn more.

Saris H3 vs. H4

The main difference between Saris H3 and H4 is that H4 offers higher resistance, gradient simulation, and higher accuracy. It also supports 12-speed cassettes.

Design-wise, H4 has yellow accents. All other features remained the same.

Saris H3 on a white background.
Saris H3
Saris H4 on a white background.
Saris H4

I summarized the technical specifications of both trainers in the following table.

FeatureSaris H3Saris H4
Gradient simulation20%25%
Power accuracy±2%±1%
Noisiness~59dBProbably the same
Auto calibrationNoNo
Power required
Flywheel20 lb (9 kg)20 lb (9 kg)
ConnectivityDual ANT+ FE-C and BluetoothDual ANT+ FE-C and Bluetooth
12-speed cassette supportNoYes
Weight47 lb (21.3 kg)47 lb (21.3 kg)
Buy (USA)Check Price
Check Price (
Check Price
Comparison of Saris H3 vs. H4 smart bike trainer features like resistance, gradient & decline simulation, power accuracy, etc.

As you can see from the table above, H4 offers 4 improvements:

  1. Higher resistance (from 2000W to 2300W)
  2. Higher accuracy (from ±2 to ±1%)
  3. Higher gradient simulation (from 20% to 25%)
  4. 12spd cassette support

I already reviewed the Saris H3, and it has one of the best (if not the best) ERG modes.

Saris H3 review: H3 on a wooden floor
Saris H3

Unfortunately, it can’t auto-calibrate, and its accuracy is worse than other high-end smart trainers.

On the other hand, it has been heavily discounted recently, making it a hard-to-pass deal.

I couldn’t get my hands on H4 (yet). But Shane Miller (GPLama) did a great review of the Saris H4. Unfortunately, the H4 didn’t end as expected.

Saris H3 vs. Saris H4 FAQ


Based on the minor improvements of the H4 and the lower price of the H3, I think H3 has become a much better deal than before.

It’s one of the best smart trainers on the market for ERG mode and structured workouts.

H4 got nice upgrades, but I feel that Saris introduced them just to match other high-end smart trainers.

I don’t think the specs bumps (like the higher resistance, gradient simulation, or accuracy) are worth upgrading if you already have H3.

Based on early reviews, it doesn’t seem that H4 provides the same (or better) experience than other high-end trainers like Wahoo KICKR v5 and v6, NEO 2T, etc.

Do you plan to upgrade, or will you look elsewhere? Let me know in the comments.

Sources (Saris H4)

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