This a kids saddle, see length in photo.
eBay
29 Inch Mountain Bike Aluminum Alloy Frame Hydraulic Disc Brake MTB Road Bicycle Shock Absorbing 24/27/30 Speed 26 27.5 Inch
Aliexpress UK
48cm lunghezza da incrocio saldature e corona pedali. 58,5cm ( della canna da saldatura a saldatura).
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ThinkRider 2PSC Ultralight Bike Inner Tube 26 27.5 29 Inches MTB Bicycle TPU Material Tire 45mm French Valve Super Light
Aliexpress UK
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TANKE Bicycle Spokes Wire With Nipples For 26/27.5/29 Inch Wheel MTB Road Bike 304Stainless Steel High Strength Bike Spoke 36pcs
Aliexpress UK
(When I tried removing it, one side didn't move at all even with a lot of force applied, and the loose cup broke off the first several threads (see photo 14). I've removed hundred of these things so I'm 100% sure I was spinning it in the correct direction :) I suspect the previous owner let water get inside and it corroded the BB to the point where it's stuck now.
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WEST BIKING Widen Bicycle Fender Durable Mountain Bike Fender For 26/27.5/29 Inch MTB Adjustable Fenders Set Cycling Protector
Aliexpress UK
Specialized Rockhopper Replaceable Derailleur Hanger off 2010 Rockhopper. May be a year or two prior /later.
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LEBYCLE Bicycle Spokes Wire Mountain Road Bike 304 Stainless Steel Spokes 14G black High-Strength Bicycle Spokes 29 Spoke Cap
Aliexpress UK
The Specialized Rockhopper MTB Cycling Shoes for men in size 4.5 (EU 36) with Shimano SPD compatibility are designed for mountain biking in all seasons. They feature a lace-up closure and a low-top shoe shaft style, with moderate cushioning for comfort and durability. The outsole is made of rubber, and the upper material is suede, with a synthetic lining for added comfort. These shoes are ideal for cycling enthusiasts looking for reliable and stylish footwear for their biking adventures.
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NanLio X7 PRO MTB Bike Suspension Fork Damping Rebound Adjustment 26/27.5/29 Inch, 120-140mm Travel, Metal Bushings Air Forks
Aliexpress UK
No dents or other issues that I could find. I'm fairly confident that this is a 2002 model. 17" seat tube (c-t).
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NanLio X7 PRO Bicycle Suspension Fork 26 27.5 29 inch 120/140MM Damped Rebound Adjustment Straight Cone Metal Bushings Air Fork
Aliexpress UK
eBay
MTB Mountain Bike Wheel Set, 29/27.5/26 Inch, 120 Ring Hub Rear, 142x12, 141x10, 148x12, Front 100x19, 100x15, 110x15
Aliexpress UK