Stack and reach
How high and how far forward the top of the head tube is, from the bottom bracket. They are the two numbers that decide whether a frame can be set up like yours.
BB, or bottom bracket
The axle your cranks turn on, in the middle of the frame. Every number on this site is measured from it, because it is the one point that sits in the same place on every bike.
Headset cover
The little cap on top of the head tube, under your spacers. Most makers do not publish it, so I assume 10 mm and add 6 mm to the band beside every answer.
Stem clamp, and its centre
The collar on the steerer that your stem bolts to. I need the middle of it. Where a maker gives only the height, I assume halfway up and say so on the answer.
Steerer
The tube coming up out of the fork. The cover, the spacers and the stem all sit on it, and it is the thing a mechanic cuts to length.
Bar reach
How far forward the hoods sit from the middle of the bar. Two bars on the same stem can put your hands 20 mm apart, which is why I ask.
Setback
How far your saddle sits behind the bottom bracket.
Drop
How much lower your hands sit than your saddle. On a riser bar I count the bar's rise, so the drop is that much less than it is to the clamp.
Rails, and the rail centre
The two rods under your saddle, and the middle of the straight part of them. That midpoint is the point I use, because it is the one you can find with a tape.
The band
How far out I could be, in millimetres, and why. It is a straight sum of everything I had to assume rather than a clever average, so it errs wide on purpose.
wb, stand, trail
Wheelbase, standover and trail: how long the bike is, how high the top tube is where you straddle it, and how steady the steering feels. I show them against your bike, and I leave them out when the maker does not publish them.
est.
Estimated: a number I worked out rather than read off the maker's table. Anything marked this way can move if the maker publishes the real one.
Close Escape closes it. The measuring guide has the pictures. Open the measuring guide
Pinarello Nytro Roadstar
Endurance road · 4 sizes
The Nytro Roadstar on pinarello.com
Sign in and add the bike you ride, and this table will say what each size needs for your position.
Sign in
This is the bike I ride
No account is needed to read the table. Report a wrong number · Correct this bike
- Bike
- Pinarello Nytro Roadstar · Endurance road · 4 sizes
- Geometry
- pinarello.com, from the Internet Archive's copy of 2021, fetched 22 Oct 2026, not yet re-checked
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 10 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
- Sheet
- 22 October 2026 · 879 bikes, 79 makes, 4,979 sizes in the catalogue
Geometry, every size, from the maker's table
The tinted row is the size drawn beside it. Press a size to draw it.The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 55 drawn to scale from the table, with no build on it. Stack and reach run from the bottom bracket to the top of the head tube; every size is solved from those two. One square is 100 mm. A dashed tube is a number the maker left out (est.).
The maker's cockpit
No stock cockpit I can name, so every size is solved on a generic stem and bar unless you choose one on the sheet.Generic stem and barAssumedNo bar is listed for this frame.
Frame facts
read off the maker's page: pinarello.com, from the Internet Archive's copy of 2021- Tyre clearance
- 28 mm
- Bottom bracket
- not published
- Axles and brakes
- 12x100 / 12x142
- UDH
- not published
- Seatpost
- MOST Alu round seatpost
- Frame weight
- not published
In the maker's words
Kept whole, as I read it off pinarello.com, from the Internet Archive's copy of 2021.The Nytro Roadstar 105 build ships with the handlebar "Jaguar XA Aero Di2" and the stem "Tiger Alu Aero Di2" (the page's COCKPIT section).
Cockpit and seatpost, in the maker's words · 52 words
The Nytro Roadstar 105 build ships with the handlebar "Jaguar XA Aero Di2" and the stem "Tiger Alu Aero Di2" (the page's COCKPIT section). The page prints no bar width, reach or drop and no stem length or angle, and does not say which width and stem each frame size ships with.
OFFICIAL SOURCE, ARCHIVED: Pinarello's own product page "Nytro Roadstar 105" (https://pinarello.com/global/en/bikes/road/supercharged/nytro-roadstar/nytro-roadstar-105) as the Internet Archive captured it on 2021-09-18: the aluminium Nytro e-road bike (frame "Aluminium 6061, triple butted with integrated battery and cable routing, 12x142 Tru-Axle", Fazua Evation Ride 50 motor, Shimano 105). Source: html table (Internet Archive snapshot 2021-09-18)
How I read the maker's table
the live site no longer has it. Its table is the one Bike Insights files as the 2021 Nytro "Gravel" build (the aluminium Nytro Grinta, which the page's compare block lists beside it), so the two aluminium Nytros appear to share one frame. The table has NO size column: size_label is the CC column written in cm (CC 440 -> "44"), as in the other Pinarello files; Bike Insights labels the same four rows S, M, L and XL (from a retailer listing). On this table CE and CC print the same number on every row (440, 500, 550, 590). Column mapping, from the legend printed beside the table ("CE: SEAT TUBE CENTER - END, CC: SEAT TUBE CENTER - CENTER, L: TOP TUBE CENTER - CENTER, A[deg]: SEAT TUBE ANGLE, B[deg]: HEADTUBE ANGLE, P: CHAINSTAY, T: HEADTUBE, D: BB DROP, R: FORK RAKE, G: FORK HEIGHT, REACH, STACK"): CE -> seat_tube_length; L -> top_tube_effective; A -> seat_tube_angle; B -> head_tube_angle; P -> chainstay (435); T -> head_tube_length; D -> bb_drop (75); R -> fork_offset (45); G (fork height, 395) not in the schema; REACH; STACK. STACK DATUM: not stated, null. Not printed, so null: wheelbase, standover, front centre, trail, stock stem and bar per size, stock tyre width ("Pirelli P7 black 60 tpi Nylon breaker, Max Tyre Size 28mm (width as measured)"). MODEL YEAR: the page prints none; 2021 is the year of the capture and the page's footer ("© 2021 - CICLI PINARELLO SRL").