WalkingPad X21 Under Desk Walking Pad vs NordicTrack T 6.5 Si Treadmill
By Billy G. · Founder & Lead EditorVerified May 22 by Billy G.
WalkingPad X21 Under
WalkingPad X21 Under Desk Walking Padvs
NordicTrack T 6.5
NordicTrack T 6.5 Si Treadmill
Worth-It Score: 73/100WAITNordicTrack T 6.5 Si Treadmill scores well, but current pricing sits above our fair-price band. Wait for a price drop before pulling the trigger.
✓VerifiedConfidence: 85%
Verdict: The NordicTrack T 6.5 Si outperforms the WalkingPad X21 for serious fitness with 10 mph top speed and 10% incline per NordicTrack specs versus the X21's 4 mph flat limit. The WalkingPad X21 wins on desk integration and quiet operation according to user reports on RTINGS-style fitness reviews. Choose based on whether the goal is office walking or home running workouts.
How we scored itSpec verificationOwner sentimentLive pricing (4h refresh)Editorial reviewOur methodology →
Winner: NordicTrack T 6.5 Si Treadmill
WalkingPad X21 Under Desk Walking Pad: 7/10
NordicTrack T 6.5 Si Treadmill: 8/10
Spec-by-spec comparison
WalkingPad X21 Under Desk Walking Pad
NordicTrack T 6.5 Si Treadmill
Max Speed
4 mph
10 mph
Incline
None
0-10%
Weight Capacity
220 lbs
300 lbs
Foldable
Yes
Yes
WalkingPad X21 Under Desk Walking Pad
What works
Compact design fits under most desks
Quiet motor suitable for office use
Easy to store when not in use
What doesn't
Limited top speed restricts running
No incline adjustment
NordicTrack T 6.5 Si Treadmill
What works
Higher speed and incline for varied workouts
Larger running deck for comfort
Built-in workout programs
What doesn't
Louder operation than walking pads
Requires more floor space when unfolded
Bottom line
Our pick: NordicTrack T 6.5 Si Treadmill. It edges out the alternative on higher speed and incline for varied workouts. That said, WalkingPad X21 Under Desk Walking Pad still wins on compact design fits under most desks — consider it if that single trade matters most for your use.