# Keiser M3i Indoor Bike vs Sole SB900 Indoor Cycle: specs and price compared

A sourced, side-by-side comparison of the Keiser M3i Indoor Bike (Keiser) and Sole SB900 Indoor Cycle (Sole) among exercise bikes. Sole SB900 Indoor Cycle is the cheaper of the two at $1199.99.

## Side by side

| Spec | Keiser M3i Indoor Bike | Sole SB900 Indoor Cycle |
| --- | --- | --- |
| US price | $2985 | $1199.99 |
| Brand | Keiser | Sole |
| Released | 2019 | — |
| Bike type | indoor | indoor |
| Resistance type | eddy current magnetic (non-contact) | magnetic (eddy current) |
| Resistance levels | 24 | 100 |
| Touchscreen (in) | — | — |
| Flywheel (lb) | 8 | 35.27 |
| Max user weight (lb) | 350 | 300 |
| Subscription required | No | No |

## Key differences

- Resistance type: Keiser M3i Indoor Bike eddy current magnetic (non-contact) vs Sole SB900 Indoor Cycle magnetic (eddy current)
- Resistance levels: Keiser M3i Indoor Bike 24 vs Sole SB900 Indoor Cycle 100
- Flywheel (lb): Keiser M3i Indoor Bike 8 vs Sole SB900 Indoor Cycle 35.27
- Max user weight (lb): Keiser M3i Indoor Bike 350 vs Sole SB900 Indoor Cycle 300

## What reviewers say

**Keiser M3i Indoor Bike** — Only one whitelisted source, Garage Gym Reviews, published usable prose for the exact Keiser M3i; Wirecutter, TechGearLab, Reviewed and Tom's Guide had no M3i review. GGR calls it a durable, extremely smooth, time-tested studio-grade bike it deems worth its $2,000-plus price, while flagging a primitive, small display and the lack of a built-in screen. (1 sourced review.)

**Sole SB900 Indoor Cycle** — Two whitelisted outlets review the exact SB900, but neither lab-measured it: Garage Gym Reviews openly states it has not tested the bike, and BarBend reports no measured numbers. Both praise the durable build, lifetime frame warranty, heavy 48-pound flywheel, and near-silent magnetic resistance, while flagging the small, bare LCD console and absent preset programs. They diverge on the resistance system's labeling and on Bluetooth support. (2 sourced reviews.)

## Sources

- Keiser M3i Indoor Bike: https://www.keiser.com/shop/cardio-equipment/m3i-indoor-bike (keiser.com, verified 2026-06-15)
- Sole SB900 Indoor Cycle: https://www.soletreadmills.com/products/sole-sb900 (soletreadmills.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/exercise-bikes/keiser-m3i-vs-sole-sb900/
Cite: Per The Front Desk Review, Keiser M3i Indoor Bike ($2985) vs Sole SB900 Indoor Cycle ($1199.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/exercise-bikes/keiser-m3i-vs-sole-sb900/
License: CC BY 4.0.