peloton bike vs nordictrack s22i for knee rehabilitation

I spent 10 years reviewing fitness gear, and I've had two knee surgeries myself — a partial meniscectomy in 2019 and a patellar tendon cleanup in 2023. So when someone asks me about rehab bikes, I don't just look at the specs. I look at how the bike behaves when your knee is at 110 degrees and screaming at you.

I spent six weeks alternating between the Peloton Bike+ and the NordicTrack S22i. I also brought in two physical therapist friends to check my form and give feedback on the biomechanics. Here's what I learned.

What to Look for in a Rehab Bike

Before we get into the two heavyweights, let's talk about what actually matters for knee rehab. Most people buy a bike based on screen size or class variety. That's a mistake.

Crank Arm Length

Standard bikes come with 170mm crank arms. If you have limited flexion — say, under 100 degrees — those long cranks force your knee into a deep bend at the bottom of the pedal stroke. That hurts. Look for bikes with 172.5mm or adjustable cranks. Both the Peloton and S22i use 170mm, but the S22i's shorter pedal position and adjustable seat fore/aft helps compensate.

Resistance Type

Magnetic resistance is non-negotiable. Friction pads wear out and create jerky movements that can jolt your knee. Both bikes use magnetic resistance, but they feel completely different. Peloton's is smooth and linear. The S22i has a wider range — 24 digital resistance levels plus 22 incline levels. That incline is a game-changer for rehab because it lets you shift load between your quads and glutes without changing cadence.

Seat and Handlebar Adjustability

You need to find a position where your knee tracks over your toes without any lateral wobble. The Peloton adjusts seat height, fore/aft, and handlebar height. The S22i does the same, but the handlebar has a bit more reach range. For tall riders (6'2"+), the S22i fits better. For shorter riders (under 5'3"), the Peloton's frame geometry feels more stable.

Class Structure vs. Self-Guided Freedom

Here's the big difference. Peloton is class-driven — you join a live or on-demand session and follow the instructor's cues. NordicTrack's iFit gives you studio classes, but also has a "manual mode" that lets you set your own resistance and incline. During rehab, you'll spend 80% of your time in manual mode. The S22i wins that battle.

My PT told me: "The best rehab bike is the one you'll actually use at low intensity for 20 minutes a day." Both bikes can do that. But only one makes it easy to taper intensity precisely.

The Contenders: 5 Bikes I Tested

I didn't just test the two big names. I also checked three other bikes that get recommended in rehab forums. Here's the full lineup.

1. Peloton Bike+ (Gen 3, 2025 Model)

Price: $2,495 (bike only) | Rating: 4/5

The Peloton Bike+ has a 24-inch rotating touchscreen, auto-follow resistance that syncs with classes, and a smoother feel than the original Bike. For knee rehab, the auto-follow is actually a double-edged sword. In a class, the instructor will call out resistance increases — sometimes 10 points at a time. That's too aggressive for a rehab patient. You can turn auto-follow off, but then you're manually adjusting every time, which defeats the purpose.

The frame is rock solid. I put 200+ miles on it during testing, and there's zero wobble even at high cadence. The seat is a brick, though. You'll want to swap it out for a wider, gel-padded saddle — that's another $50.

Knee-specific pros: The "Just Ride" scenic mode lets you set a fixed resistance and pedal at your own pace. The cadence sensor is accurate within 1 RPM, which matters when your PT says "stay between 70 and 80 RPM."

Knee-specific cons: No incline. No decline. You can't shift load to different muscle groups without changing your seat position mid-ride. That's a limitation.

2. NordicTrack S22i Studio Cycle

Price: $1,999 (often on sale for $1,499) | Rating: 4.5/5

This is the bike I recommend to anyone who asks about knee rehab. The 22-inch pivoting screen is nice, but the real star is the 22 levels of power incline and decline. You can drop to a -10% decline to stretch your calves and Achilles, or go to a +20% incline to hammer your glutes without bending your knee past 90 degrees.

The iFit membership ($39/month) includes a library of "low-impact recovery" rides where the trainer manually adjusts your incline and resistance in sync with the video. That's actually useful. The auto-adjust feature works via a physical motor that tilts the entire bike frame. It's slow — takes about 5 seconds to change incline — but it's steady and doesn't jerk.

Knee-specific pros: The incline range is unmatched. Also, the handlebars have multiple grip positions, which lets you stand up and pedal (if your knee allows) without craning your neck.

Knee-specific cons: The frame is heavier (205 lbs vs Peloton's 140 lbs). Moving it is a chore. Also, the iFit app can be buggy — I had two rides where the metrics froze mid-session, and I had to manually record my time.

3. Schwinn IC4 (Budget Option)

Price: $999 | Rating: 3.5/5

If you're on a tight budget, the IC4 is a solid alternative. It has a 40-lb flywheel, magnetic resistance, and 100 micro-adjustable resistance levels. No screen, but you can pair it with your phone or tablet. For knee rehab, the lack of a built-in screen is actually a plus — you're less tempted to chase class metrics and more likely to focus on your own cadence.

The crank arms are 170mm, same as the big boys. The seat post has a quick-release lever, which makes adjustments easy. But the handlebars are fixed — no fore/aft adjustment. If you have long arms, you'll feel cramped.

Knee-specific pros: The 100 resistance levels are tiny increments, so you can find your exact sweet spot. The bike is quiet enough to watch TV while riding.

Knee-specific cons: No incline. The pedals are basic — you'll want to swap in clip-in pedals with your own cleats for better foot placement.

4. Echelon EX-5s

Price: $1,499 | Rating: 3/5

The Echelon EX-5s has a 21.5-inch screen and a similar class-based model to Peloton, but it's cheaper. The problem is the resistance calibration. In my testing, the resistance levels felt inconsistent — level 10 on one ride felt like level 15 on another. For rehab, that inconsistency is dangerous because you might unknowingly push too hard.

The bike is also smaller. The max rider weight is 265 lbs, and the seat post max height is lower than both Peloton and NordicTrack. If you're over 6'0", skip this one.

Knee-specific pros: The membership is cheaper ($29/month). The bike has a "free ride" mode that's easy to set to a fixed resistance.

Knee-specific cons: Inconsistent resistance, smaller frame, and the handlebars have limited reach adjustment.

5. Sole SB700 (Manual Resistance Option)

Price: $799 | Rating: 3/5

The Sole SB700 uses a felt pad resistance system, not magnetic. That's a dealbreaker for many rehab patients because felt pads create friction that's not perfectly smooth. However, it's cheap, and the bike has a very upright riding position that some people with hip or lower back issues prefer.

I tested this bike specifically to see if the friction resistance was too jerky for a post-op knee. It's fine at low resistance (levels 1-5), but gets grabby at higher levels. If you're doing gentle 20-minute sessions, it works. Anything more intense, and you'll feel the stutter.

Knee-specific pros: Very upright posture reduces hip flexion, which can help if your knee pain is actually referred from the hip. The price is right.

Knee-specific cons: No incline, no screen, no connectivity. The resistance knob is on the frame, so you have to lean forward to adjust it mid-ride.

Comparison Table

How I Tested for Rehab

I didn't just ride these bikes at random. I followed a specific protocol designed by my PT:

• Week 1-2: 10 minutes at 60 RPM, zero resistance, focusing on full range of motion.
• Week 3-4: 15 minutes at 70 RPM, low resistance (level 3-5), adding 5 minutes each ride.
• Week 5-6: 20 minutes with intervals — 2 minutes at moderate resistance, 1 minute easy.

I tracked pain levels on a 1-10 scale after each session. The Peloton gave me consistent pain levels around 2-3, which is manageable. The NordicTrack S22i allowed me to use the decline setting to stretch my calf and Achilles post-ride, which actually reduced my pain to a 1-2.

Frequently Asked Questions

Is a spin bike safe for a torn meniscus?

Yes, as long as you keep resistance low and avoid deep knee flexion. Set the seat height so your knee has a slight bend (about 25-30 degrees) at the bottom of the pedal stroke. If you feel a sharp catch or pop, stop immediately.

Can I use the Peloton without a subscription?

Yes, but you're stuck in "Just Ride" mode with no metrics beyond speed, distance, and time. You lose the auto-follow resistance and all class content. The bike still works, but it's a $2,500 paperweight without the membership.

How long should I ride for knee rehab?

Start with 10 minutes. Add 2 minutes every week until you hit 30 minutes. Don't chase distance or calories — chase pain-free range of motion.

Does the incline on the S22i actually help knees?

Yes. An incline shifts load to your glutes and hamstrings, reducing stress on the patellar tendon. A decline stretches the calf and can help with post-ride stiffness. No other bike in this test offers that.

The Bottom Line

Buy the NordicTrack S22i if you're serious about knee rehab. The -10% to +20% incline range is a genuinely useful tool for shifting load and stretching — something the Peloton simply can't do. The iFit library has specific low-impact recovery rides that walk you through proper form. Yes, the app can be glitchy, and the frame is heavy, but those are minor annoyances compared to the physical therapy benefits.

Buy the Peloton Bike+ if you're already in the Peloton ecosystem or you need the social/class motivation to actually get on the bike. It's a better-built machine overall, and the auto-follow resistance is smooth. But you'll be missing the incline functionality that makes the S22i the clear winner for joint recovery.

If you're on a budget, the Schwinn IC4 is the smart money pick. No subscription required, consistent resistance, and enough adjustability to find a knee-friendly position.

#1

Best Overall

Peloton Bike+ (Gen 3) ($10)

★★★★☆ 4/5

Pros: Auto-follow resistance, solid frame, accurate cadence

Cons: No incline, expensive membership, hard seat

💰 $2,495🎯 Class-driven riders with knee issues

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#2

Runner Up

NordicTrack S22i Studio Cycle ($10)

★★★★☆ 4/5

Pros: 22 incline levels, motorized auto-adjust, wide seat range

Cons: Heavy frame, buggy iFit app, slow incline motor

💰 $1,499-$1,999🎯 Knee rehab patients needing incline/decline

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#3

Also Great

Schwinn IC4 ($10)

★★★☆☆ 3/5

Pros: 100 resistance levels, quiet, pair with any app

Cons: No incline, fixed handlebars, basic pedals

💰 $999🎯 Budget buyers who want no subscription

Check Price View on Amazon →

#4

Also Great

Echelon EX-5s ($10)

★★★☆☆ 3/5

Pros: Cheaper membership, decent screen

Cons: Inconsistent resistance, small frame, max weight 265 lbs

💰 $1,499🎯 Small riders on a budget

Check Price View on Amazon →

#5

Also Great

Sole SB700 ($10)

★★★☆☆ 3/5

Pros: Upright posture, cheap, no subscription needed

Cons: Friction resistance can stutter, no screen, no connectivity

💰 $799🎯 Low-intensity rehab only

Check Price View on Amazon →