SKU: 37038289026
gravel bike factor

gravel bike factor Factor Bikes OSTRO Gravel – Above Category

Sale price$19.45 Regular price$21.61
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Ships within 48 hours · Estimated delivery Nov 14 - Nov 19

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Description

gravel bike factor Factor Bikes OSTRO Gravel – Above CategoryThe OSTRO Gravel is a high performance aero gravel bike designed for speed and versatility on mixed terrain. It features aerodynamic tube shapes, generous 45mm tire clearance, and a lightweight yet robust frame, making it ideal for gravel racing and off road adventures. In short, it's a bike built to win on any less than pristine surface, should you have the will. Or the legs. Factor's thinking behind the OSTRO Gravel's sculpted (but very tasty) lines

The OSTRO Gravel is a high-performance aero gravel bike designed for speed and versatility on mixed terrain. It features aerodynamic tube shapes, generous 45mm tire clearance, and a lightweight yet robust frame, making it ideal for gravel racing and off-road adventures.

In short, it's a bike built to win on any less-than-pristine surface, should you have the will. Or the legs. 

Factor's thinking behind the OSTRO Gravel's sculpted (but very tasty) lines is that gravel racing is often as fast as road racing. Perhaps not at Unbound's muddier editions, but give the OSTRO its head on a plunging fire trail or forest singletrack, and you'll soon see Factor's point. Gravel racing is getting really quick, and, as we all know, to finish first, first you must be fast. Or something like that.

To weave its way through the wind, Factor spent a lot of time on the OSTRO Gravel's head tube, where an all-new tube shape unlocked significant drag reductions by manipulating the 'laminar separation bubble' that occurs near the front of airfoils at lower speeds. According to Factor, the tech is rooted in aerospace. However, Factor assures us that all we need to know is that the OSTRO Gravel will get to the finish line faster and by minutes, not seconds.

With those muddier editions of Unbound in mind, Factor is also keen to reassure that the OSTRO Gravel's 45mm tire clearance is as-measured, with 4mm clearance either side in accordance with ISO standards. And that means mud won't stop the party. You may still cry. But at least your wheels will be happy.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
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SKU: 37038289026

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4.3 ★★★★★
Based on 16 reviews
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RVartist
Lexington, US
★★★★★ 3
one fits, other too big
Size: X-Large, Color: Navy/Sage Green
The good: made with a nice fabric, a good weight and soft. Color for both shirts is what I expected. I wish I could keep just one shirt. The navy blue tank top fit perfect and was comfortable. Green, same size as the blue one, was uncomfortably big. Arm holes 2 whole inches larger than the blue top. This type of inconsistent sizing is frustrating.
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Reviewed in the United States on May 1, 2026
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Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Good quality, not sure on fit
Size: X-Large, Color: Black/Mariner Stripe
I looked at the general comment on this top and it stated frequently returned due to loose fit. My measurements are close to size xl so I figured if they run large/loose then they would fit me fine. My bust is 46 1/2" and I probably should have gone xxl. The tops are snug across my breast and I will have to be adjusting so it does not pull a gap at the side of the arm pit area. However the top is not too snug, also not loose throughout the rest of the body so don't know how I would feel about a size larger. The quality is nice, medium weight cotton. No see through and no falling in creases. I hope washing these in cold and line drying will keep them from shrinking. I will keep these because I do like the quality and length but have not decided if I will order more or not.
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Reviewed in the United States on February 18, 2026
M
Verified Purchase
Mara
San Leandro, US
★★★★★ 2
Weirdest armhole proportions I've seen
Size: X-Large, Color: Navy/Sage Green, Size: X-Large, Color: Navy/Sage Green
There are a few nice things about these tanks -- I like the colors, there's a little extra length in the back, and the fabric is a thick quality fabric. I appreciate the fact they're 100% cotton and was looking forward to wearing these. Overall, the tanks fit as I would expect for the size. But what in the world is up with the dimensions for the arm holes? There is a significant amount of extra fabric that bunches up and looks awful (see photos) I've never had this happen on a tank top before, even one that's a size up. It's really strange and I'm disappointed that I can't keep these because of it.
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Reviewed in the United States on June 6, 2026
E
Verified Purchase
Elisabet
Lake Worth, US
★★★★★ 5
Comfortable Sleep Tanks, Weird Fit for Daytime
Size: Small, Color: Hot Pink/Oatmeal Heather
These 100% cotton tanks are perfect tops to wear at home: soft, breathable, and great for sleeping or lounging. The pink is extremely bright (borderline highlighter), while the beige is a much more wearable, calm color. The fit is a little odd on me—something about the cut just doesn’t sit right—so I wouldn’t wear them out of the house, but as a comfy bedtime set of two, they do the job.
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Reviewed in the United States on February 2, 2026
F
Verified Purchase
FC
Omaha, US
★★★★★ 4
Very reasonable price for the quality
Size: Small, Color: Navy/Sage Green
The tank tops are well-made with quality fabric. I like the subdued colors, too. Unfortunately the tank tops don't fit me well.
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Reviewed in the United States on May 12, 2026

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