Topo Athletic / Ultrafly

Ultrafly 4

Stability2022 · Global · Type unknownChecked 2026-10-26

Ultrafly 4 is an all-purpose road trainer for everyday running and runners seeking subtle pronation support. A cushioned ZipFoam midsole is paired with an external TPU heel counter and EVA medial post to provide light guidance. Its recycled engineered-mesh upper and roomy toe box allow the toes to spread naturally, combining a comfortable fit with the series' smooth-running focus.

Key specifications

Weight

272 g

All models average 268.9 gDifference from average +3.1 g

Average of 973 models

Drop

5 mm

All models average 6.8 mmDifference from average −1.8 mm

Average of 986 models

Stack (heel)

28 mm

All models average 34.3 mmDifference from average −6.3 mm

Average of 810 models

MSRP

$135.00 USD · US · Tax excluded

All models average $165.57Difference from average −30.57 USD

Average of 680 models

This modelAll models average

Stack (forefoot): 23 mm
Carbon plate: Unknown
Midsole: ZipFoam
Outsole: Rubber
Use cases: Daily / Stability

Weight notes Men’s weight at M9.

IN CONTEXT

Specs in context

Weight × stack788 models shown

Topo Athletic Ultrafly 4272 g / 28 mm

Weight distribution973 models

95 g385 g

This model 272 gAll models average 268.9 gDifference from average +3.1 g

Drop distribution986 models

0 mm12 mm

This model 5 mmAll models average 6.8 mmDifference from average −1.8 mm

Stack distribution810 models

5 mm60 mm

This model 28 mmAll models average 34.3 mmDifference from average −6.3 mm

MSRP distribution · USD · US · Tax excluded680 models

$50.00$500.00

This model $135.00All models average $165.57Difference from average −$30.57

Unknown values are excluded. Shoe sizes and measurement conditions vary, so use these averages and distributions as a guide when comparing specifications.

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