The dependable, easy-to-operate Ariens RAZOR 21 Reflex mower with variable-speed Reflex self-propelled drive and easy-adjust cutting heights. 163cc engine, 21-in. deck — built for properties up to 1 acre.
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See It In Action
Real walkarounds, expert reviews and buyer's guides — see the RAZOR 21 REFLEX in action before you buy.
Product Features
The General Transmission® MA 302 rear-wheel REFLEX™ drive moves at up to 4 mph and gives instant, responsive control on hills and turns compared to a front-wheel-drive design.
A 163 cc Briggs & Stratton EXi 725 engine powers the REFLEX™ drive system while delivering a clean, consistent cut.
The 21-in. (53.3 cm) deck adjusts from 1 in. to 4 in. across 7 positions for a precise cut in any season.
The RAZOR 21 REFLEX carries Ariens' extended 3-year residential / 90-day commercial warranty — the longest in this lineup.
Technical Specs
*Warranty term limited to years or hours used, whichever comes first. Specifications based on published information and subject to change without notice.
Compare Models
| Model | Price | Power | Deck / Cut | Drive | Weight |
|---|---|---|---|---|---|
 RAZOR 21 PUSHView → | $399 | 150cc | 21" | Push | 68 lb |
 RAZOR 21 SPView → | $499 | 163cc | 21" | Self-Propelled | 79 lb |
| RAZOR 21 REFLEX(this) | $599 | 163cc | 21" | Reflex SP | 82 lb |
 CLASSIC 24View → | $899 | 212cc | 24" | 2-Stage | 191 lb |
 DELUXE 24View → | $1,299 | 252cc | 24" | 2-Stage | 216 lb |
Full Ariens operator's manual and RAZOR Series product brochure ship digitally with your order.
Free freight to the lower 48. Delivered curbside with liftgate — driver schedules the appointment in advance.
Backed by the Ariens 3-year residential / 90-day commercial limited warranty on new equipment.
4.8
357 verified owner reviews
SteveL
Port Charlotte, FL
Bought this fine quality RAZOR 21 REFLEX from Lowe's with the military discount and free delivery — prompt and easy. Once delivered, we were mowing that same afternoon. The cut looks fantastic.
Verified owner
Charlene's Owner
Wilmington, NC
The 163cc engine delivers a great cut. The REFLEX™ rear-wheel drive is easier and more responsive on slopes than my old mower. The fuel gauge on the deck makes fill-ups easy to plan.
Verified owner
JesseMicroFarmer
Vernon, NJ
I am seriously so happy to own a RAZOR 21 REFLEX. My property is less than half an acre but it was a pain with a plain push mower. Can't believe the turn radius with the REFLEX™ drive.
Verified owner
F33rNoFish
Clements, CA
Purchased from Lowe's with the extended warranty, the bagger and mulch kit. First cut was awesome and I'm loving all the little feature details this mower has.
Verified owner
GrantOwens
Springfield, OH
The REFLEX™ rear-wheel drive is the reason I finally enjoy mowing my sloped yard. Cut quality is exceptional after 40 hours.
Verified owner
Master Chief Steve
Chesapeake, VA
Just bought my RAZOR 21 REFLEX after my local Lowe's offered me a great Military discount and free delivery. I'm graduating from an old push mower and didn't realize how out of date it was. The REFLEX™ rear-wheel drive handles hills easily, and the bagging system is well designed.
Verified owner
JesseMicroFarmer
Vernon, NJ
I am seriously so happy to own a RAZOR 21 REFLEX. My property is less than half an acre but it's a pain with a plain push mower — this thing is perfect. Can't believe the turn radius with the REFLEX™ drive versus other mowers I've had. Made in America and now mowing an American lawn!
Verified owner
Charlene's Owner
Wilmington, NC
The 163cc engine delivers a great cut. The REFLEX™ rear-wheel drive feels responsive on slopes. The 21-in. deck fits through my gate and still knocks out the whole lawn quickly.
Verified owner
F33rNoFish
Clements, CA
Purchased from Lowe's and it arrived quickly. Took me a minute to figure out the drive bail, but after that, first cut was awesome. Got the extended warranty and the bagger, and I'm loving all the little feature details this mower has.
Verified owner
Marcia
DeSoto, KS
RAZOR 21 REFLEX mows really well and seems to have a tighter turning radius than my old mower. Nice even cut of the lawn and easy to jump behind and go. The dealer was quick to help when I had a question early on.
Verified owner
TannerHill
Country House, VT
Bought this for my country house on 2 acres and the size is perfect. Handles slopes, cuts evenly, and the 163cc engine has plenty of power for tall spring grass. The 21-in. deck gets around trees and through the gate without issue.
Verified owner
SteveL
Port Charlotte, FL
This is more than enough for our lot. Delivery from Lowe's was prompt and free, and after a quick setup we were mowing the same afternoon. The REFLEX™ drive is a perfect small workhorse — quiet, easy to steer, and the cut looks fantastic.
Verified owner
GrantOwens
Springfield, OH
The REFLEX™ rear-wheel drive is the reason I finally enjoy mowing my sloped yard. Responsive and smooth, combined with the 3-year warranty, keeping the RAZOR 21 REFLEX running strong is nearly effortless.
Verified owner
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Take home the Ariens RAZOR 21 Reflex today — free freight, 3-year warranty, 50% off for a limited time.
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