PURPLE PIE Pinion P1.12 Dynamo Build

Description

Balanced, low maintenance, terrain focused

The Purple Pie approaches off‑road riding from a fundamentally different angle. Rather than optimising individual components around performance peaks, it is built around consistency, balance and long‑term composure. At the heart of this approach sits the Pinion gearbox—a central element that defines how the bike rides, ages and is used.

From the first ride, the Purple Pie feels solid and calm. The centralised mass of the gearbox lowers the bike’s centre of gravity, giving it a planted, almost anchored feel on loose ground. Where some bikes feel nervous when traction becomes unpredictable, the Purple Pie stays composed, encouraging confidence rather than reaction.

The geometry reinforces this character. The riding position supports long, steady efforts over mixed and broken terrain, favouring control and balance over sharp, momentary responses. Acceleration is smooth and intentional, translating rider input into forward motion without sudden spikes. This is a bike that rewards measured riding rather than urgency.

The Pinion gearbox plays a defining role in shaping this experience. Shifts are consistent, protected from impact and contamination, and independent of derailleur alignment or hanger condition. Gear changes feel deliberate and calm, reinforcing a steady riding rhythm that suits off‑road terrain exceptionally well.

Centralised drive for consistent riding

Unlike conventional derailleur systems, the Pinion system concentrates mass low and central within the frame. This has a direct effect on handling. The bike feels more stable through technical sections, more predictable when climbing loose terrain, and less affected by baggage or surface changes.

Gear steps remain evenly spaced, supporting consistent cadence across a wide range of gradients. Instead of reacting to terrain with rapid, corrective shifts, the rider settles into a rhythm and lets the bike maintain momentum. This becomes especially noticeable over longer off‑road rides, where efficiency and composure matter more than immediacy.

The Purple Pie frame is designed around this drivetrain, not adapted to it. Stiffness, compliance and load paths are balanced to accommodate the gearbox’s characteristics, resulting in a ride that feels intentional rather than engineered around compromise.

Low maintenance as a design principle

Mechanical simplicity here does not mean minimalism—it means longevity. With the drivetrain protected inside the frame and unaffected by dirt, mud or impacts, the Purple Pie becomes a bike that thrives on use rather than careful management.

For riders who spend significant time off pavement, this reliability becomes part of the appeal. There are fewer components exposed to wear, fewer adjustments needed mid‑season, and less performance drift over time. Riding becomes more about the route than the upkeep.

Positioned within the curated range

Within the Purple Pie lineup, this build represents the most focused expression of the platform. Compared to dynamo‑equipped configurations, it prioritises purity and direct terrain interaction. Compared to externally geared alternatives, it offers stability and composure through centralised mass and protected mechanics.

It is curated for riders who value calm confidence off‑road—those who prefer predictability and balance over constant optimisation.

Off‑road riding without fragility

The Purple Pie does not try to feel fast by being light at all costs. Instead, it feels capable by remaining stable. Routes that deteriorate, surfaces that shift and rides that stretch longer than planned are treated as normal conditions rather than complications.

This build invites trust. It feels reassuring under load, calm in difficult sections and consistent across distance.

A balanced off‑road build.
Defined by low maintenance and centred control.
Curated for riders who want a terrain‑focused bike that stays composed, reliable and predictable no matter how rough the ride becomes.

Curated Build Kit

• Fork: Sour Adventure Fork Steel or Sour Business Fork Carbon
• Drivetrain: Pinion P1.12 Smart Shift gearbox, 39t/32t and Gates belt, Battery and charger included
• Brakes: TRP HYWIRE
• Wheelset: Duke Worldrunner X25, SON 28 CL Dynamo, Duke CL rear hub 28h, Sapim CX Ray Spokes
• Complete Easton EA70 AX cockpit:
• XS — 70mm stem; handlebar 400mm 16° flare; seat post 27,2x350mm; Easton bartape
• S — 90mm stem; handlebar 400mm 16° flare; seat post 27,2x350mm; Easton bartape
• M-L — 100mm stem; handlebar 420mm 16° flare; seat post 27,2x350mm; Easton bartape
• XL-XXL — 110mm stem; handlebar 440mm 16° flare; seat post 27,2x350mm; Easton bartape
• Lights: Supernova E3 Pure + Supernova Tail Light
• Saddle: SQ Lab 612 Ergowave: XS-L 140mm // XL-XXL 150mm
• Headset: Acros
• Tires: Schwalbe G-One R 700×50
• Color: Traffic Yellow