Factor OSTRO Gravel vs Factor SARANA: which bike is right for you?

Compare ride character, intended rider, geometry, and fit. Add your measurements to see which bike suits you better and which size to choose on each.

Fit verdict: the frame positions are close, a few millimetres apart. The frame alone will not decide this; use your measurements to see which size and setup gets nearer to your position on each bike.

Compare them for meCompare geometry and sizes

In one look

Factor OSTRO Gravel: race geometry. Factor SARANA: endurance geometry.

  • The frame front of Factor SARANA is slightly higher, by about 6 mm. That difference alone does not settle your position.
  • The frame front of Factor SARANA is slightly shorter, by about 4 mm.

Independent tests land on opposite sides here: Factor OSTRO Gravel is called firm, Factor SARANA unusually smooth for a race bike.

These two split on maximum tyre clearance; the sourced values are below. What each difference means for your size, your setup and the riding you describe is in the full comparison.

  • Maximum tyre clearanceDiffersSource 1Source 2
    Factor OSTRO Gravel
    45 mm
    Factor SARANA
    57 mm

    Tyre width decides which surfaces stay comfortable. A few millimetres is the difference between staying on tarmac and being able to drop onto gravel without a second bike.

  • Price

    Both start at a similar price level, going by the cheapest build you can buy of each.

Subjective findings from independent tests on stock or near-stock builds. Tyres, pressure and size change how a frame feels.

We compare differences at frame and model level. Components, current price, and availability depend on the exact build and seller.

2026 • race geometry
Factor OSTRO Gravel
Size guide and geometry for the Factor OSTRO Gravel
2026 • endurance geometry
Factor SARANA
Size guide and geometry for the Factor SARANA

Fit and size differences

The matched frame measurements differ by only a few millimetres, so stem and spacer choices can matter more than the frame.

Typical difference across matched sizes: frame front height 6 mm, forward length 4 mm.

For a personal answer, the fit-and-size path uses your measurements to show only the relevant frame sizes. The full chart remains available as a reference.

View geometry for every size

How do Factor OSTRO Gravel and Factor SARANA sizes compare?

See the closest size matches and the differences in stack, reach, and riding position.

Factor OSTRO Gravel
49
Stack 515, Reach 377
Factor SARANA
49
Stack 544, Reach 378

Stack: 29 mm taller

Reach: practically identical

Factor OSTRO Gravel
52
Stack 535, Reach 385
Factor SARANA
49
Stack 544, Reach 378

Stack: 9 mm taller

Reach: 7 mm shorter

Factor OSTRO Gravel
54
Stack 555, Reach 394
Factor SARANA
52
Stack 558, Reach 388

Stack: 3 mm taller

Reach: 6 mm shorter

Factor OSTRO Gravel
56
Stack 580, Reach 402
Factor SARANA
54
Stack 573, Reach 398

Stack: 7 mm lower

Reach: 4 mm shorter

Factor OSTRO Gravel
58
Stack 605, Reach 412
Factor SARANA
58
Stack 613, Reach 418

Stack: 8 mm taller

Reach: 6 mm longer

Factor OSTRO Gravel
61
Stack 625, Reach 422
Factor SARANA
58
Stack 613, Reach 418

Stack: 12 mm lower

Reach: 4 mm shorter

The same size label can create a different position on each frame. Stack and reach are one part of the decision; the personalized comparison connects them to your body and each bike’s ride character.

FAQ

Can the same rider take different sizes on these two bikes?
Yes. Frame labels are not standardized, so the same rider may need different sizes. This comparison deliberately avoids a generic matched-size answer and hands your measurements to Bike Fit instead.
Which frame has the higher front: Factor OSTRO Gravel or Factor SARANA?
The frame front of Factor SARANA is slightly higher, by about 6 mm. That difference alone does not settle your position.

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