Put on a new set of wheels

Suddenly, skating is on a roll. Wild new wheel configurations, expandable-length frames, even modernized versions of the old “quad” skate are breathing new life into the activity. Although participation in skating has plunged by nearly half from its peak of 32 million in 1998, according to Sports Data Group Inc., these innovative products might jump-start a rolling revival.

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Something completely different

Landroller: The only skate with two wheels -- giant, side-mounted ones that angle inward.

Likes: It gives the same smooth, fast ride as a regular in-line skate, with no learning curve. Longish (10 1/2 inches) wheelbase has a good glide. Very attention-getting; get used to people shouting “cool!” Despite the huge wheels (diameters of 5.5 and 6.75 inches), your foot rests about the same height off the ground as in a typical skate.

Dislikes: Replacement wheels cost $40 a pair, double the price of regular wheels.

Price: $249. (888) 494-6343; www.landroller.com.

Sleek and speedy

K2 Radical 100: Rapid transit for strong skaters.

Likes: Pure speed. The massive 12.6-inch wheelbase and 100-millimeter wheels accelerate rapidly, and the comfortable, soft boot with a low cuff makes it easy to bend far forward. Zip closure over laces looks sleek.

Dislikes: None.

Price: $299. (800) 426-1617; www.k2skates.com.

For a custom fit

Rollerblade Astro 7 and Wing 7: The Astro for men and the Wing for women are solid all-round skates with unique fitting technology.

Likes: Fast, custom fit; just push a button and turn the Micro TFS dial, which tightens a web of Teflon strings around your foot. Just one buckle, at top of strap. 80-millimeter wheels.

Dislikes: None.

Price: $149. (800) 232-ROLL; www.rollerblade.com.

Old-fashioned ride

Riedell Energy Zone: Traditional rectangular-formatted 4-wheel skate.

Likes: Super-comfortable suede boot feels more natural than the typical, inline skate boot. Stable, more-upright body position makes it better for skate dancing and is easier on beginners. Offers a good fitness workout. Convenient, old-style drag toe stop. Great price.

Dislikes: Much slower than an inline skate, with a much shorter glide. Can’t lean too far forward on the short, 7-inch wheelbase without some instability.

Price: $129. (877) 277-2346; www.riedellskates.com.

-- Roy M. Wallack