MASH AC-4 Blacklight Purple Frame Set
Check your size based on your height
Check your size based on your height
Shows size options that fit your height. Fit can vary with proportions, riding style, and position, so please use this as a general guide.
Sizing can change with riding style and position. If you are near a boundary, please contact Circles.
このフレームで、一台を組んでみませんか?
ハンドルもホイールも、自分らしい組み合わせで。サイズ選びからお手伝いします。
From San Francisco to the worldwide motorcycle scene,MASH / MASHhas had a huge impact on the world of motorcycles. 's original "AC " series of truck frames. The long-awaited fourth installment of the series is now available. They have emerged from the world of track bikes and are always showing us new ways to play with them.
Custom built with Columbus 7005 series Airplane tubing, the AC-4 is sure to turn heads on the streets with its stunning graphic work by Portland artist Al Nelson.
Blacklight Purple
This model is not a very calm color scheme, but the regularity of the design is what draws the eye. The design is so stylish that it makes you feel like you are buying a piece of art rather than a frame. It is not only flashy and cool, but also has a mysterious atmosphere.
AC-4
The biggest update is the extension of tire clearance up to 32c. Nothing will cramp your style anymore.
The 1 1/8"-1 1/2" tapered fork is made of completely original carbon monocoque, worked from the mold. It is rigid and extremely lightweight, and its unprecedented 30mm rake truncation angle will allow for sharp cornering.
Smoothly finished fork crowns and rear bridge hide guides for retrofitting brakes. Like the AC-3, it also includes bottle mounts for quick hydration.
For those who love criteriums and want to ride like an arrow through the streets.
You want a frame that responds directly to your needs, no matter how far and how fast you ride.
Establish the best style for you.
[SPEC]
Size:S, M, L
Seatpost diameter:27.2mm
Front end width:100 x Φ 9 mm
Rear end width:120 x Φ 10 mm
Head standard:1 1/8"-1 1/2" tapered *CHRIS KING DropSet™ 2 can be used.
BB standard:JIS 68mm
Tire clearance:700 x 32c (recommended)
Brakes:Front and rear short arches
Frame Material:COLUMBUS 7005Series Airplane
Fork Material:Carbon
Accessories:Head parts, seat clamp, stem cap, pressure plug
[GEOMETRY]
| Sizes. | S/52 | M/54 | L/56 |
| Seat tube length (C-T/mm) | 520 | 540 | 560 |
| Seat tube length(C-C/mm) | 480 | 500 | 520 |
| Top tube length(C-C/mm) | 525 | 540 | 560 |
| Head tube length(mm) | 110 | 125 | 145 |
| Seat tube angle(°) | 75.5 | 75.5 | 75.5 |
| Head tube angle(°) | 73.5 | 74.5 | 75 |
| Fork Lake(mm) | 30 | 30 | 30 |
| Chainstay length (mm) | 389 | 389 | 389 |
| BB drop (mm) | 54 | 54 | 54 |
| Fork length | 368 | 368 | 368 |
| Reference height (cm) | 168-173 | 173-178 | 178-185 |
MASH / BUILT TO BE YOURS
フレームから、
あなたの一台へ。
フレームセットは、組み方しだいでまったく違う一台になります。ハンドル、ホイール、タイヤ、バッグまで、乗りたい場所と使い方に合わせてCirclesが一緒に考えます。
このフレームで完成車を相談する →※ページ上部の販売価格はフレームセット単体の価格です。

BUILD YOUR BIKE WITH CIRCLES
どんな一台を、
一緒につくりましょうか。
フレームセットだけ欲しい人も、パーツを持ち込んで組みたい人も、最初から全部相談したい人も。まずは走りたい場所や今の自転車の話を聞かせてください。
01 乗り方を聞く
街・旅・林道、身長や今の自転車、ご予算。
02 サイズと構成を決める
ホイール、ハンドル、コンポーネント、バッグ。
03 見積もりと組み立て
仕様・金額・納期を確認してから進めます。
身長からのサイズの目安は、ページ上部の「身長から適切なサイズを確認する」で確認できます。境界付近で迷う場合は、そのままご相談ください。
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