B737 Undifferentiated or Other Model
Time Pressure; Confusion; Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Equipment / Tooling; Procedure; Human Factors
During a walk around; per 1 service.  Came upon #3 main landing gear tire.  Saw wear that showed tiny spots of chord.  Tire change.  Utilized my IPAD to acquire the IPC (Illustrated Parts Catalog) and MM (Maintenance Manual) effective for Aircraft X.  I then proceeded to gather the tools and equipment and upon arriving at the tire rack; I read the sign posted for a 737-XXX carbon tire.  There at the rack; I noticed that there were 2 tires of which one was secured by a chain link.  I decided to take the other serviceable tire which was not chain linked but nevertheless was under the rack labeling of a -XXX and then I proceeded to go to aircraft and begin my LOTO (Lock Out Tag Out) procedures to include installing of gear pins.  I completed the tire replacement with some assistance from one of my fellow AMTs (Aviation Maintenance Technicians) and completed all computer transactions as necessary and also issued the AWR (Airworthiness Release).  It's obvious that I need to be extra careful and be more attentive in regards to taking the necessary time to actual confirm the correct part without being rushed and pressured which may lead to other unfortunate events.  In this event; I happened to retrieve the tire I thought that I needed but yet it wasn't.
Aviation Maintenance Technician installed incorrect tire on 737.