Teased at Bespoked in Dresden this fall, the new Sour Purple Pie is a Pinion-equipped drop-bar bike with clearance for 55mm tires and geometry suited for long days in the saddle. Dig into the details here…

Just released, the new Sour Purple Pie is described as an all-terrain accomplice for heading into the hills or cruising endless backroads, wherever your curiosity leads. It’s designed around a Saxony-made Chromoly steel frame, with clearance for up to 700 x 55mm (29 x 2.2″) tires, and is derailleur-less thanks to a Pinion gearbox with Smart.Shift electronic shifting.

sour purple pie
  • sour purple pie
  • sour purple pie

The Purple Pie has a splittable sliding rear dropout for belt-drive setups, plenty of mounting points (you can add more for a price), and it can be purchased with Sour’s carbon Business Fork. Sour designed the Purple Pie’s solid steel bridge to make welding easier for their framebuilders, but also to get as much tire clearance as possible for riders. The frame uses 12mm thru-axles, a 27.2mm seatpost, and has internal brake routing. A medium frame weighs around 2,795 grams without paint, and each framset includes a complete Pinion C1.12 Smart.Shift Gearbox system, a Pinion cold forged crankset, and a set of TRP Hywire Brifters.

Purple Pie Geoemtry

Size XS SM MD LG XL
ST LENGTH 450 480 510 540 570
TT LENGTH 519 532 545 561 576
REACH 374.2 378.2 377.6 382.7 383.8
STACK 540.3 554.4 593.9 602.1 628.5
HT ANGLE 70.5° 70.5° 70.5° 71.5° 71.5°
HT LENGTH 120 135 145 160 190
ST ANGLE 75° 74.5° 74° 73.5° 73°
CS LENGTH 440 440 440 440 440
BB DROP 72 72 72 72 70
WHEELBASE FORK 1031.8 1034 1040 1042 1052
FORK LENGTH 405 405 405 405 405
FORK OFFSET 45 45 45 45 45
MAX SP INSERTION* 241 271 271 301 331
WHEEL SIZE 700C 700C 700C 700C 700C
sour purple pie
  • sour purple pie
  • sour purple pie

The Purple Pie comes in five frame sizes (XS-XL) with a 70.5-71.5° head tube angle, 75-73° seat tube angle, 440mm chanstays, and a 70-72mm bottom bracket drop. Each frame is produced in a small batch, and the planned completion date for the first batch is in February 2026. Pre-orders are open now for €3,499 (frame, no fork), with add-ons available.

Visit Sour.Bike to learn more.

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