Best for warranty and simplicity
Schwinn IC3
FitScore for Spin Bike
- ResistanceFriction, stepless knob
- Max user weight300 lb
- Warranty5 year frame, 2 year parts
- Product weight100 lb
Choose it if you want a 5-year frame warranty, a rider range stated in feet and inches, and a simple knob-adjusted ride.
Best for flywheel and app
Sunny Health & Fitness SF-B1805SMART
FitScore for Spin Bike
- ResistanceMagnetic, stepless knob
- Max user weight297 lb
- Warranty3 year frame, 6 months p…
- Product weight124.5 lb
Choose it if you want a heavier flywheel, magnetic resistance, transport wheels and a free app with no membership.
Overall winner for most spin bike buyers: Schwinn IC3, by 1.5 points (74 against 72.5) with the weights of our best spin bike guide. It leads on durability and features. The Sunny Health & Fitness SF-B1805SMART leads on performance, affordability and practicality.
Schwinn IC3 wins 2 rounds- Sunny Health & Fitness SF-B1805SMART wins 2 rounds
- =1 tie
Product photos from Amazon. FitScore weights are explained below.
Schwinn IC3 vs Sunny SF-B1805SMART: the IC3 is the simpler bike with a longer frame warranty, while the Sunny has a heavier 44-lb flywheel, magnetic resistance and a free app. Our FitScore gives the IC3 a narrow lead for most spin bike buyers.
Head-to-Head Specs
Here are the two side by side, from the Amazon US listings, completed from each maker’s page for the same model only where a listing is silent. A check mark shows the stronger spec on each line. Before you order either model, search the CPSC recall database: the U.S. Consumer Product Safety Commission lists exercise bike recalls and the fix offered. The CDC recommends that adults get at least 150 minutes of moderate-intensity aerobic activity a week, which steady cycling counts toward. Harvard Health Publishing lists about 252 calories in 30 minutes of moderate stationary cycling for a 155 lb person.
| Specification | Schwinn IC3FitScore 74 | Sunny Health & Fitness SF-B1805SMARTFitScore 72.5 |
|---|---|---|
| Type | Spin (indoor cycling) | Spin (indoor cycling) |
| Resistance | Friction, stepless knob | Magnetic, stepless knob |
| Flywheel | 40 lb | 44 lb✓ |
| Max user weight | 300 lb✓ | 297 lb |
| Size (length × width) | 54.6 × 30.7 in | 50.8 × 23.4 in |
| Product weight | 100 lb✓ | 124.5 lb |
| Rider fit | Riders 5’1″-6’4″ | Inseam 29.9-40 in |
| Seat and handlebar | 4-way seat, 4-way handlebar | 4-way seat, 4-way handlebar |
| Console and programs | Basic LCD console (programs not stated) | Basic LCD console (programs not stated) |
| Bluetooth and apps | Bluetooth | Bluetooth, SunnyFit (free) |
| Heart rate | Compatible with a chest strap (not included) | Not stated |
| Membership | Optional (extra classes) | None needed |
| Storage and moving | No transport wheels listed, 100 lb | Transport wheels, 124.5 lb |
| Warranty | 5 year frame, 2 year parts✓ | 3 year frame, 6 months parts |
| Specs won | 3 of 14 | 1 of 14 |
Check Amazon for current pricing and availability.
FitScore Duel
Both scores use the weights of our best spin bike guide (how we score). Performance (40%) counts most, then durability (25%), comfort (15%), affordability (10%) and practicality and features (5% each). The Schwinn IC3 ranks #1 in that guide. The Sunny Health & Fitness SF-B1805SMART ranks #2 in that guide. The order flips with other weights: in our best budget exercise bike guide the Sunny Health & Fitness SF-B1805SMART scores 65 against 63.7 for the Schwinn IC3.
Key Differences
- Resistance: Friction, stepless knob on the Schwinn IC3; Magnetic, stepless knob on the Sunny Health & Fitness SF-B1805SMART.
- Flywheel: 40 lb on the Schwinn IC3; 44 lb on the Sunny Health & Fitness SF-B1805SMART.
- Max user weight: 300 lb on the Schwinn IC3; 297 lb on the Sunny Health & Fitness SF-B1805SMART.
- Size (length × width): 54.6 × 30.7 in on the Schwinn IC3; 50.8 × 23.4 in on the Sunny Health & Fitness SF-B1805SMART.
- Product weight: 100 lb on the Schwinn IC3; 124.5 lb on the Sunny Health & Fitness SF-B1805SMART.
- Rider fit: Riders 5’1″-6’4″ on the Schwinn IC3; Inseam 29.9-40 in on the Sunny Health & Fitness SF-B1805SMART.
- Bluetooth and apps: Bluetooth on the Schwinn IC3; Bluetooth, SunnyFit (free) on the Sunny Health & Fitness SF-B1805SMART.
- Heart rate: Compatible with a chest strap (not included) on the Schwinn IC3; not stated on the Sunny Health & Fitness SF-B1805SMART.
Round 1 of 5
Schwinn IC3 vs Sunny SF-B1805SMART: Resistance and Flywheel
Sunny Health & Fitness SF-B1805SMART wins this round
Here is how the two compare on the work the machine does.
Resistance: Friction, stepless knob on the Schwinn IC3, Magnetic, stepless knob on the Sunny Health & Fitness SF-B1805SMART.
Flywheel: 40 lb on the Schwinn IC3, 44 lb on the Sunny Health & Fitness SF-B1805SMART.
Performance score in this comparison: Schwinn IC3 85, Sunny Health & Fitness SF-B1805SMART 95.
Round 2 of 5
Capacity, Frame and Warranty
Schwinn IC3 wins this round
Capacity and warranty are the stated measures of build.
Max user weight: 300 lb on the Schwinn IC3, 297 lb on the Sunny Health & Fitness SF-B1805SMART.
Warranty: 5 year frame, 2 year parts on the Schwinn IC3, 3 year frame, 6 months parts on the Sunny Health & Fitness SF-B1805SMART.
Durability score in this comparison: Schwinn IC3 79.4, Sunny Health & Fitness SF-B1805SMART 50.14.
Round 3 of 5
Fit and Riding Position
Tie. Neither model has a clear edge here.
Type: both list spin (indoor cycling).
Rider fit: Riders 5’1″-6’4″ on the Schwinn IC3, Inseam 29.9-40 in on the Sunny Health & Fitness SF-B1805SMART.
Seat and handlebar: both list 4-way seat, 4-way handlebar.
Comfort score in this comparison: Schwinn IC3 76, Sunny Health & Fitness SF-B1805SMART 76.
Round 4 of 5
Size, Weight and Moving
Sunny Health & Fitness SF-B1805SMART wins this round
Size (length × width): 54.6 × 30.7 in on the Schwinn IC3, 50.8 × 23.4 in on the Sunny Health & Fitness SF-B1805SMART.
Product weight: 100 lb on the Schwinn IC3, 124.5 lb on the Sunny Health & Fitness SF-B1805SMART.
The Sunny is shorter and narrower and has transport wheels, which makes it easier to slide into a corner, but it is the heavier of the two.
Practicality score in this comparison: Schwinn IC3 28, Sunny Health & Fitness SF-B1805SMART 46.
Round 5 of 5
Console, Apps and Extras
Schwinn IC3 wins this round
Console and programs: both list basic LCD console (programs not stated).
Bluetooth and apps: Bluetooth on the Schwinn IC3, Bluetooth, SunnyFit (free) on the Sunny Health & Fitness SF-B1805SMART.
Heart rate: Compatible with a chest strap (not included) on the Schwinn IC3; the Sunny Health & Fitness SF-B1805SMART listing does not state it.
Features score in this comparison: Schwinn IC3 30, Sunny Health & Fitness SF-B1805SMART 25.
Who Should Buy Each
Riders who want a longer frame warranty
Pick the Schwinn IC3 if the 5-year frame warranty and a 61 to 76 inch rider range matter, and you are happy with a basic console.
Riders who want app tracking without a membership
Pick the Sunny SF-B1805SMART if you want a 44-lb flywheel, a smaller footprint and the free SunnyFit app, and can live with a shorter warranty.
Consider Instead
Sunny Health & Fitness SF-B901SMART
If neither fits, look at the Sunny Health & Fitness SF-B901SMART: it offers a higher affordability and practicality score than the Schwinn IC3. It ranks #3 in our best spin bike guide.
Final Verdict
Overall winner for most spin bike buyers: Schwinn IC3. Pick the IC3 for the longer frame warranty; pick the Sunny SF-B1805SMART for the heavier flywheel, smaller footprint, wheels and free app.
Schwinn IC3 vs Sunny Health & Fitness SF-B1805SMART FAQ
With the weights of our best spin bike guide, the Schwinn IC3 scores higher: 74 against 72.5. It leads on durability and features, while the Sunny Health & Fitness SF-B1805SMART leads on performance, affordability and practicality.
The Sunny weighs about 124.5 lb on its listing against 100 lb for the IC3, though it takes less floor space.
No. The Sunny states none is needed, and the Schwinn IC3 listing describes classes as optional.
Explore More Exercise Bike Guides
Schwinn IC3 Review
Sunny Health & Fitness SF-B1805SMART Review
Best Spin Bike for Home (2026): 5 Indoor Cycling Bikes Ranked
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