YT Jeffsy 27.5 2020 Geometry | Size Chart & Analysis

Sizing up the YT Jeffsy 27.5 2020? Compare its reach, stack, and handling against 200+ bikes with our Bike Geometry Comparison and Fit Calculator.

Sizes	S	M	L	XL	XXL
A Toptube length	567 mm	590 mm	613 mm	636 mm	660 mm
B Reach	422 mm	442 mm	462 mm	482 mm	502 mm
C Stack	598 mm	608 mm	617 mm	626 mm	635 mm
D Seattube length	395 mm	415 mm	435 mm	460 mm	485 mm
E Chainstay length	432 mm	432 mm	432 mm	437 mm	437 mm
F Headtube angle	65,5 / 66 °	65,5 / 66 °	65,5 / 66 °	65,5 / 66 °	65,5 / 66 °
G Seattube angle (eff.)	76,5 / 77 °	76,5 / 77 °	76,5 / 77 °	76,5 / 77 °	76,5 / 77 °
H BB Drop	13 / 6 mm	13 / 6 mm	13 / 6 mm	13 / 6 mm	13 / 6 mm
I Wheelbase	1167 mm	1191 mm	1215 mm	1244 mm	1268 mm
J Headtube length	110 mm	120 mm	130 mm	140 mm	150 mm
K BB height	344 / 352 mm	344 / 352 mm	344 / 352 mm	344 / 352 mm	344 / 352 mm

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Ride character of the YT Jeffsy 27.5 2020

In size L, the YT Jeffsy 27.5 2020 pairs balanced 432 mm chainstays that keep it lively without feeling nervous; a steeper 655.0° head angle that keeps the steering quick and efficient; a moderate 462 mm reach; a steep 765.0° effective seat angle that puts your hips over the bottom bracket for climbing.

Those numbers describe how it steers and sits. How the suspension actually feels, small-bump sensitivity, mid-stroke support and bottom-out ramp, comes down to its leverage and anti-squat curves: see our MTB suspension kinematics guide, and put its geometry head-to-head with any other bike in the geometry comparison tool.

About Us

Bikometry is a discipline focused on the science and art of understanding the geometry and linkage of mountain bike frames and their suspension systems.

This intricate field studies the angles, distances, and details that define a bike's performance on various terrains. Every aspect, from the head tube angle to the chainstay length, influences how the bike behaves.

Linkage, which connects the rear wheel to the bike frame, combined with the suspension, ensures smooth rides by absorbing shocks from the terrain.

By understanding bikometry, whether you're a designer, professional rider, or enthusiast, you can optimize bike performance, choose the right model, or even craft a custom bike. Dive into bikometry with us and explore the nuances that make mountain biking exhilarating.

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Related Geometry

Ride character of the YT Jeffsy 27.5 2020

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