I’m not a biker, but know that many cyclists come through Kyrgyzstan on their Silk Road journey. Here are some useful information from www.bike.net.kg/en_hire.htm. Stores selling outdoor gear & specifically bicycles & spares.
Free Bike
Address: ул. Кулатова 18 (in English: Kulatova)
Tel: 0 996 312 59-17-12, 0 996 312 54-55-54, 0 996 555 97-50-47
e-mail: freebike@mail.ru or it_expert@inbox.ru
Mountain Project
Bishkek, 216/3, Toktogula str., Tel.: + 996 312 31 76 44
Web: http://www.mountainpro.kg
Selling: Clothing for alpinists and tourist, clothing for skiers and snowboarders.
Equipment: sleeping bags, camps, bags, mats, mountain bikes, lights, gas and gas cartridge and etc.
Tourism: Adventure tours, Mountaineering, Heli-Skiing, Auto-Safari.
Red Fox
Bishkek, 65, Sovetskaya str., Tel.: + 996 312 59 17 55
Web: http://www.redfox.ru
Selling and rent: Clothing: for alpinism, hiking, skiing and snowboarding, boots.
Equipment: camps, sleeping bags, bags, skis, snowboards, mountain bikes, mats, gas and gas cartridge.
Alpik
Bishkek, 80, Mira av., Tel.: + 996 312 56 13 84
Web: http://www.alpik.kg
Selling: Outdoor equipment and clothing.
Gergert Sport
Bishkek, 119, Gorkogo str., Tel.: + 996 312 54 16 11
Selling and rent: skis, snowboards, sport equipment, mountain bikes.
Clothing: for sport, skiing and snowboarding.
Yuganov – Specialized bicycle store
Bishkek, 14/a, Serova str., Tel.: + 996 312 67 09 74
Equipment: all necessary equipment for bikers, mountain bikes.
Repair of mountain bikes.
Drive – Specialized bicycle store
Bishkek, 213, Tokrogula str., Tel.: + 996 312 65 55 51
Web: http://www.giant-bicycles.in.kg
Selling and repair of bicycles.
Sport Express
Bishkek, 73/1 Mira Ave, Tel.: + 996 312 69 49 48
Selling: Outdoor equipment.