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All yo-yos have passed the manufacturer's quality inspection. Quality standards vary by manufacturer. Basically, products that can be used normally are within product specifications.
Examples of possible initial defects
For more information about competitive yo-yos, please see here.
Also, if you have any problems with yo-yos, please check our Q&A.
A blast from the past! Koi bucks all modern trends as a classic round metal yo-yo.
This classic round metal yo-yo is brought to you by yoyofriends, and defies the current trends in modern yo-yo design. The artwork reflects the name, with a "Koi" fish motif. The design also defies the use of straight lines, as it's a totally rounded profile. The naming is part of this design as well. To date, yoyofriends has released the Peregrine, Magpie, Hummingbird and Sunbird, all inspired by birds, and all containing straight lines in their profiles. The Koi represents a conceptual departure, moving from the air to the water, and the different taste represented by this new design.
It's slightly on the heavy side at 66 grams, but thanks to the profile it has a very nice soft feeling that really fits well. Thanks to the 7068 aluminum body, the axle area is made extra thin, so that there's a lot more weight distributed to the outer edge than you can see at first glance. Compared to the old classics, the Koi is a huge power-up in performance, without changing any of the outward appearance.
Official Description
KOI showcases a different side of yoyofriends by focusing on flow and feel. It has an overall organic shape that still packs performance. KOI has an optimized center/rim weight distribution to give a relaxed experience when throwing normally. It also has optimized power and acceleration to handle all the tricks when pushed. KOI is the everyday carry that gives users a fun and pleasant experience no matter the situation.
| ブランド | yoyofriends |
| シリーズ | nothing special |
| シグネチャー | - |
| スタイル | String tricks (1A, 3A, 5A) |
| 対象年齢 | No particular indication |
| ブランド国 | China |
| 発売年 | 2020 |
| 重さ (g) | 66.0 |
| 直径 (mm) | 55.97 |
| 本体幅 (mm) | 43.94 |
| トラピーズ有効幅 (mm) | 41 |
| ボディ形状 | round |
| ボディ素材 | Aluminum alloy (A7068) |
| リム種類・素材 | none |
| ベアリング・軸の種類 | center track bearing |
| ベアリングサイズ | Size C (Large) |
| レスポンスシステム（サイズ） | Slim (OD 19mm) |
| アクセル(軸) | M4 x 10mm |
| 分解 | Possible |
| スペーサー | none |
| バインド | Bind required |
| 表面加工 | Smooth processing |
| メンテナンス |
| Brand | yoyofriends |
| Series | nothing special |
| Signature | - |
| Style | String tricks (1A, 3A, 5A) |
| age | No particular indication |
| Designed in | China |
| Release Year | 2020 |
| Weight (g) | 66.0 |
| Diameter (mm) | 55.97 |
| Width (mm) | 43.94 |
| Trapeze Width (mm) | 41 |
| Body Shape | round |
| Body Material | Aluminum alloy (A7068) |
| Rim | none |
| Bearing Type | center track bearing |
| Bearing Size | Size C (Large) |
| Response System | Slim (OD 19mm) |
| Axle | M4 x 10mm |
| Twist-apart | Possible |
| Spacer | none |
| Bind | Bind required |
| Surface | Smooth processing |
| Maintenance |
