Which is better for a first 100-mile trail race?

The Brooks Caldera 8. Its plush cushioning and wide, stable platform are what reviewers credit for comfort over long hours, and protection from rocks matters more at that distance than a few ounces of weight.

The Caldera 8 generally holds up better on rocky ground because of its thicker outsole and protective midsole. The inov-8 is lighter, so its outsole and upper wear faster on harsh terrain.

Is the inov-8 worth stepping up to if I have wide feet?

No. The inov-8 comes in medium width only with a round toe, so wide-footed runners usually do better in the Caldera 8's wide platform.

Which is better on wet, technical descents?

The Caldera 8. Reviewers specifically call out its grip on slippery downhills and its stability on steep, technical trails.

Do both have the same heel drop?

Yes. Both list a 6 mm heel-to-toe drop, so the choice comes down to cushioning, fit and weight rather than drop.

Which is better for road ultras?

Neither is designed for road ultras. Both are trail shoes; the Caldera 8's lugs and the inov-8's lug sole suit dirt and rock, not pavement.

Inov-8 TrailFly Ultra G 300 MAX vs Brooks Caldera 8

The Brooks Caldera 8 is the stronger pick for most trail ultra runners. It has a plush, protective platform, a wide fit, and reviewers consistently praise its grip and stability on technical, steep terrain. The inov-8 TrailFly Ultra G 300 MAX is lighter and has a 6 mm drop, but it comes in medium width only and its round toe is less roomy. Choose the Caldera 8 for rocky, wet, long-distance trails; choose the inov-8 if you want a lighter shoe and a medium fit works for you.

Choose the inov-8 TrailFly Ultra G 300 MAX if you want a lighter trail shoe with a 6 mm drop and a medium-width fit suits your foot.
Choose the Brooks Caldera 8 if you run technical or steep trails and want plush cushioning, a wide platform and proven grip on wet descents.

Prices

Inov-8 TrailFly Ultra G 300 MAX: $49.99 at Amazon (last seen Nov 10)
Brooks Caldera 8: $59.95 at eBay (last seen Nov 13)
Difference: the Inov-8 TrailFly Ultra G 300 MAX is $9.96 cheaper than the Brooks Caldera 8 at the latest prices (Nov 10 and Nov 13)

Inov-8 Women's TrailFly Ultra G 300 MAX Trail Running Shoes

	Inov-8 TrailFly Ultra G 300 MAX	Brooks Caldera 8
Cushioning	Firm, lower-profile ride built for ground feel	Plush, protective stack that stays comfortable over long hours
Fit and toe box	Medium width only, round toe	Wide platform, almond toe, roomier forefoot
Trail grip	Lug rubber outsole for trail traction	Reviewers praise grip on slippery downhills and rocky terrain
Weight	About 0.6 lb listed, lighter on the foot	About 10.6 oz, heavier due to max cushion
Heel-to-toe drop	6 mm	6 mm
Closure	Standard lace-up	Single-pull lace, though owners say flat laces come undone
Weather protection	No waterproofing listed	Waterproof build with moisture-wicking materials
Sizing	Runs true per listing	Reviewers say it runs a little big

Spec	Inov-8 TrailFly Ultra G 300 MAX	Brooks Caldera 8
Shoe size	6	11
Brand	inov-8	Brooks
Athletic shoe type	Trail Running Shoes	Cross-Training Shoes
Color	Gray	Black
Shoe category	Women's Shoes	Men's Shoes
Shoe width	Medium	Wide
Shoe closure	Lace-Up	Single-Pull Lace
Footwear feature	Lug Sole	Moisture Wicking
Sport	Trail Running	Trail Running
Insole material	Polyester	Mesh
Material	Polyester	Mesh
Gender	Female	Male

Spec	Inov-8 TrailFly Ultra G 300 MAX	Brooks Caldera 8
Age group	Adult	Adult
Toe style	Round Toe	Almond Toe
Model	978	110440-052
Assembled product weight	0.6 lb	1.58 lb
Shoe sole material	Rubber	—
Heel drop	6 mm.	—
Shoe collar height	Low	—
Color category	Gray	—
Pattern	Solid Print	—
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Inov-8 TrailFly Ultra G 300 MAX vs Brooks Caldera 8

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Inov-8 TrailFly Ultra G 300 MAX vs Brooks Caldera 8

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Inov-8 TrailFly Ultra G 300 MAX

Brooks Caldera 8

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Inov-8 TrailFly Ultra G 300 MAX

Brooks Caldera 8

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Brooks Caldera 8

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Inov-8 TrailFly Ultra G 300 MAX

Brooks Caldera 8

What separates them

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Inov-8 TrailFly Ultra G 300 MAX

Brooks Caldera 8

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Brooks Caldera 8

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