Timex Men’s Ironman Triathlon Classic 100 44mm Watch

Product Overview

The Timex Men’s Ironman Triathlon Classic 100 44mm Watch is a high-performance digital sport watch designed for athletes and fitness enthusiasts who need reliable timing tools during training and competition. Built with a durable dark gray resin top ring and metallic silver case, this watch combines rugged functionality with a sleek, athletic design. It’s ideal for runners, triathletes, and anyone engaged in structured workouts requiring precise lap times, interval tracking, and long-duration monitoring.

Featuring advanced sport timing capabilities such as a 100-hour chronograph, extensive memory recall, and synchro timer functions, the T5E231 model ensures you can monitor multiple segments of your workout without interruption. Whether you’re following a structured training plan or pushing through a personal best, this watch supports detailed performance analysis with features like best lap, average lap, and total segment time tracking.

With water resistance up to 100 meters, dual time zones, and FLIX technology that activates the Indiglo night-light with a simple wrist flick, this watch delivers both utility and convenience. Its lightweight construction—weighing just 1.6 ounces—ensures comfort during extended wear, while the included lithium metal battery provides consistent power over time.

Key Features

• 100-Hour Chronograph with Lap/Split Option: Enables precise measurement of race segments or intervals with the ability to record either lap times or split times across a full 100-hour duration, perfect for long-distance training sessions.
• 100-Lap Memory Recall & 199-Lap Counter: Stores up to 100 completed laps in memory for later review and tracks a maximum of 199 laps during a single workout session, giving athletes access to historical data for performance evaluation.
• On-the-Fly Recall of Lap or Split Times: Allows users to instantly retrieve recent lap or split times mid-workout without interrupting their routine, ensuring seamless monitoring during intense training.
• Interval Timers Up to 24 Hours: Includes nine customizable timers—some with countdown-to-zero and repeat functionality—enabling users to set up complex workout routines involving timed rest periods and repeated cycles.
• Training Log with Performance Metrics: Records workouts by date and stores key metrics including best lap time, average lap time, and total segment time, helping users track progress over time.
• Total Run Format / Synchro Timer: Maintains cumulative activity time while excluding paused intervals, offering an accurate measure of actual exercise duration regardless of interruptions.
• Dual Time Zones: Supports tracking of two different time zones simultaneously, useful for international travelers or those coordinating with global training partners.
• Built-In Setting Reminders: Provides alerts to help maintain consistency in workout schedules and routine adjustments based on predefined reminders.
• Water Resistance to 100 Meters: Suitable for swimming, rain exposure, and daily wear in wet conditions, making it versatile beyond land-based sports.
• FLIX Technology with INDIGLO Night-Light: Activates the illuminated display with a firm forward flick of the wrist—no button press required—after enabling Night Mode; delivers 5 seconds of uniform backlighting using energy-efficient electroluminescent lighting.
• Black Resin Strap: Durable and comfortable for all-day wear during physical activity, resistant to sweat and minor impacts.

Technical Specifications

• Model Number: T5E231
• Case Material: Metallic silver finish with dark gray resin top ring
• Strap: Black resin band
• Dial Size: 44mm
• Battery Type: 1 Lithium Metal (included)
• Water Resistance: 100 meters (330 feet)
• Chronograph Duration: Up to 100 hours
• Lap Memory: Up to 100 laps
• Lap Counter Capacity: Up to 199 laps
• Timer Functions: Nine timers, some with countdown and repeat modes
• Time Zones: Two selectable zones
• NIGHT-MODE Activation: Press and hold INDIGLO button for three seconds until beep
• INDIGLO Illumination: Uniform blue electroluminescent lighting, lasts 5 seconds when activated via FLIX or button press
• Weight: 1.6 ounces
• Dimensions: 5.98 x 5.98 x 5.98 inches
• Department: Men’s
• Manufacturer: Timex
• ASIN: B00093CZV0
• Date First Available: October 1, 2001
• Discontinued By Manufacturer: No

Benefits & Use Cases

This watch is engineered specifically for serious athletes participating in endurance sports such as running, triathlons, and interval training. Its robust timing suite allows users to structure workouts with precision, from tracking individual mile splits during a marathon to managing swim-bike-run transitions in a triathlon event.

The training log feature makes it particularly valuable for athletes focused on improving performance over time, as it captures detailed metrics tied to specific dates. This enables users to analyze trends in pacing, recovery, and consistency across multiple sessions.

With water resistance rated at 100 meters, the watch performs reliably whether used during pool workouts, open-water swims, or everyday activities exposed to rain or splashes. The lightweight build and flexible resin strap ensure comfort even during prolonged physical exertion.

The inclusion of dual time zones adds practical value for athletes who travel frequently or train with coaches or teammates in different regions. Meanwhile, the FLIX-enabled Indiglo lighting system enhances usability in low-light environments without draining battery life, thanks to its efficient electroluminescent technology.

Important Notes

To use FLIX technology, users must first activate Night Mode by pressing and holding the INDIGLO button for three seconds until a beep confirms activation. Afterward, a firm wrist flick is required to trigger the night-light—this prevents accidental illumination from minor movements or vibrations during activity.

The watch comes with a pre-installed lithium metal battery and is not waterproof beyond its 100-meter rating; it should not be submerged deeper than specified or exposed to pressurized water sources such as diving tanks.

While the product remains available despite being released in 2001, customers seeking newer models may want to verify current availability or consider updated versions within the Ironman series. Warranty claims must be submitted directly through Timex customer service.