A comparison of Sunny SF-B1712 vs SF-B901B vs SF-B1714 vs SF-B1805 features. I’ve not reviewed in depth 3 out of the 4 bikes yet. THe one bike i’ve looked at in details is the Sunny Health & Fitness SF-B1805 although I have reviewed the Sunny SF-B901 chain drive not the belt drive.
They are all good solid indoor cycling bikes that will give a smooth and consistent pedaling experience to match the intensity of workout you want.
The two magnetic friction will provide a low maintenance and quiet option as there is no pad touching the flywhell to wear out and cause a whooshing sound as it rubs on the wheel. You may find the friction options (SF-B901B and SF-B1712 have stronger friction at the top end depending on hoew hard you want to set the resistance).
I think the bikes should be adjustable for your height of 5 ft 2 ins but it would be good to measure your inseam to ensure it is 28 ins or longer for SF-B1714 and SF-B1805, 29 ins for SF-B901B and 27 is for SF-B1712.
The SF-B901B has one feature I’m not a fan of that and it is how it applies friction using a caliper rather than direct on to the wheel. It just seems to me there is more to go wrong. Also you can’t adjust the handlebars backwards and forwards so you may find you can get as comfortable fit as you caan with the other 3.
As to the other 3 indoor cycling bikes, I like the SF-B1805 above the other 2 because of the tablet holder and the micro-adjustability of the handlebars and the seat, , the narrower q-factor (distance between pedals resulting in better alignment and less potential strain on the joints, a larger padded seat which many find comfortable (but isn’t for everyone).
None of the bikes have a computer but can be added afterwards along with SPD pedals (check thread) or a different seat if the one it comes with is too unbearable.
| Feature | SF-B1712 | SF-B1714 | SF-B901B | SF-B1805 |
|---|---|---|---|---|
| Flywheel Weight | 44 lbs | 44 lbs | 40 lbs | 44 lbs |
| Resistance Type | Friction | Magnetic | Friction | Magnetic |
| Drive Type | Belt | Belt | Belt | Belt |
| Pedals | Toe Cages | Toe Cages | Toe Cages | Toe cages |
| Bike Weight | 108.9 lbs | 135.58 | 102 lbs | 125.7 lbs |
| Max User Weight | 265 lbs | 330 lbs | 275 lbs | 300 lbs |
| Min Inseam | 27 ins | 28 ins | 29 ins | 28 ins |
| Max Inseam | 35 ins | 37 ins | 41 ins | 38 ins |
| Handlebars Adjustability | Horizontal/Vertical | Horizontal/Vertical | Vertical | Horizontal/Vertical |
| Seat Adjustability | Horizontal/Vertical | Horizontal/Vertical | Horizontal/Vertical | Horizontal/Vertiical |
| Dimensions | Height: 45.5 ins Width: 20 ins Length: 45.25 ins | Height: 53.5 ins Width: 24 ins Length: 48.5 ins | Height 51.2 ins Width 21.2 ins Length 45.0 ins | Height 45 ins Width 23 ins Length 48 ins |
| Console | No | No | No | No |
| Seat Dimensions | Height 2.5 ins Width 6.5 ins Length 10.5 ins | Height 2.8 ins Width 8 ins Length 10 ins | Height 2.5 ins Width 6 ins Length 10 ins | Height 3 ins Width 8 ins Length 10 ins |
| Q Factor | N/A | 216 mm | N/A | 182 mm |
| Gear | Fixed | Fixed | Fixed | Fixed |
| Bluetooth | No | No | No | No |
| App | No | No | No | No |
| Media Tray | No | No | No | Yes |
| Transport Wheels | Yes | Yes | Yes | No |
| Other Extras | Water Bottle Holder | Water Bottle Holder | Water Bottle Holder | Water Bottle Holder |