Kadro kulağı ayrı olmayan bisikletlerin(ssli) kulağı yamulunca ne yapılıyor?

Şekillerde görüldüğü gibi özellikle tur bisikletlerinde, kadrolarında ek bir kulak olmayan modeller var bu tür bisikletlerde kadro kulağında bir yamulma, burkulma kırılma durumlarında neler yapılıyor? Teker takma yerine takılan kulaklar var fakat çoğu bisikletin teker takma yeri(özel bir adı var mı?) tam tekerin içinden geçen vidaya göre... Bu durumlarda ne yapılması gerekiyor? Hangi tür kulak kullanılacak? Düzeltme 1-2 tamam peki kırılınca ?

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http://monometal.com.tr/wp-content/uploads/2013/03/celik-ortopedik-cekic.jpg

Alttaki surly bisiklet üzerinden konuşayım. Surly özellikle uzun turlarcular için yaptığı bisikletlerle bilinir. Bu bisikletler çeliktir. Çelik, kuvvet uygulandığında hemen kırılmayan esnediğinde yaylım yaylım esneyen bir yapıya sahiptirler. Bir nevi kendinden amortisörlü. Uzun turcular için ürettiği bisikletin kadro kulağının tümleşik olmasının sebebi ise, eğer tur yapan kişi dünyanın az gelişmiş bölgelerine veya herhangi bisikletçinin dahi olmadığı bir yerde kadro kulağını kırarsa kadro kulağı aramakla uğraşmasın. Bisiklet Çelik nasıl olsa, kendisine en yakın bir kaynakçıya gidip kaynağını kolayca yapıp yoluna devam etsin diye böyle düşünülmüş birşey.

http://img02.imgsinemalar.com/images/haber_anasayfa/Kilisede-El-Fatiha.jpg

Nasıl yani gerçekten kaynaktan başka bir çözümü yok mu? Bir de o parçayı kaynaklattırmak ayrı bir iş... Tura çıkarken yedek kulak önemli diyordum ben de peh
İngiliççe sitelerde de pek bir şey göremedim

küçük yamulmalarda ayarlı pense ile güzelce sıkıştırıp yavaş yavaş güç uygulayarakdüzeltilir, çok yamulduysa demirciye gideceksiniz ısıtıp düzeltecek ondan sonra soğuk suya daldırması gerekiyor, kırıldıysa eğer iyi bir kaynak ustası eskisinden bile sağlam hale getiriyor. hepsini denedim başka yolu yok