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Sunny Health & Fitness SF-B1805SMART (substituted for Bowflex C6): What to Know
Substitution disclosure: the original candidate for this slot was the Bowflex C6. We checked directly and found no working Amazon listing for the bike itself, only third-party AC power adapters compatible with it. Bowflex currently sells the C6 through its own site, Johnson Fitness, and retailers like Best Buy and Dick's Sporting Goods, but not through a first-party Amazon listing. In its place, we're covering Sunny Health & Fitness's SF-B1805SMART, a bike that fills a similar role, a no-built-in-screen, app-optional bike well under premium pricing, and that does have an active, verifiable Amazon listing.
According to Sunny's own product page and the Amazon listing's feature bullets, the SF-B1805SMART uses a 44-lb flywheel, the heaviest of the five bikes in this guide, paired with magnetic belt-drive resistance for a smooth, quiet ride. Max user weight is listed at 300 lbs. The seat and handlebars adjust four ways, and steel toe-cage pedals with adjustable straps are included rather than the SPD-compatible dual-sided pedals found on the Schwinn IC4 and Echelon EX5, worth knowing if you specifically want to ride in clip-in cycling shoes.
The standout difference from every other bike in this guide: the SunnyFit companion app, which streams real-time ride metrics over Bluetooth, offers location-based virtual routes, and includes over 1,000 workout videos, is free with no subscription tier, according to Sunny Health & Fitness's own app page. That makes this the one bike on the list, alongside the Schwinn IC4's core console functions, that carries zero required ongoing cost. The specific Amazon listing referenced here also bundles a foam floor protector mat, worth noting since it affects what you're actually paying for versus the bike alone.
This won't match the NordicTrack S22i's motorized incline or the Peloton Bike's production-quality classes, and the included pedals are more basic than the clip-in-capable options elsewhere in this guide. But for anyone who wants a genuinely low-impact home cardio option without committing to a monthly fee or a four-figure price tag, it's a reasonable, honestly-specced entry point.
Key Listed Features
44-lb flywheel with magnetic belt-drive resistance, the heaviest flywheel of the five bikes here
Free SunnyFit app with Bluetooth metrics, no subscription required
300-lb max user weight with 4-way adjustable seat and handlebars
Adjustable toe-cage pedals (not SPD clip-in compatible)
