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Surprise tire issues wreak havoc during only NASCAR Cup practice in Phoenix

The lone practice session for the NASCAR Cup Series title-decider at Phoenix Raceway began with a flurry of tire issues.

It didn't take long for the drama to unfold. As Hamlin pulled out of line and slowed to avoid all the traffic, trouble found his title rival and Joe Gibbs Racing teammate Chase Briscoe.

The No. 19 slowed down the backstretch with a cut left-rear tire, dragging the underside of the car as he limped it back to the pits.

At the same time, A.J. Allmendinger stopped with a left-front tire failure. Both incidents happened within the first five minutes of practice.

The red flag was displayed, and once the session went back green, another JGR car slowed with a cut left-rear -- Christopher Bell

Denny Hamlin kept running despite the issues impacting his teammates, only for another red flag for the stopped car of Daniel Suarez, also with a flat left-rear.

Hamlin went to the garage and the team began work underneath the car in reaction to the tire issues.

The fifth tire issue involved another Toyota, with the No. 35 23XI Racing of Riley Herbst. Unfortunately for him, he actually hit the outside wall as the left-rear went flat.

His issue didn't cause a stoppage as he drove it back to the pits, but teams were holding their breath as they tiptoed around the circuit.

The third red flag of the session was for Allmendinger, who went straight into the wall in a major crash entering Turn 3. He later claimed he suffered a flat right-front tire just before the accident.

While it's unclear if it was another problem, Chase Elliott also slowed with a potential tire issue and immediately went to the garage out of an abundance of caution. His Hendrick Motorsports teammate and Championship 4 driver Kyle Larson also touched the wall at the exit of Turn 4 while pushing, but it was nothing to be concerned about.

The fourth red flag was for the stopped car of Kyle Busch, who cut a left-rear as well. Earlier in the session, he also touched the wall.

Briscoe got back on track, but complained about a vibration and quickly returned to the garage. Suarez cut another left-rear tire near the end of the session, but the practice remained green as he drove it back.

What's going on?

After the session, Briscoe spoke with FS1 about his day: "I guess it's a good thing that it's not just us. It's unfortunate that it's happening, but at least we're not on an island by ourselves. I'm share James [Small, crew chief], and everybody on our Bass Pro Shops Toyota will figure out what we can do to help manage that on Sunday. But yeah, definitely alarming.

"Wasn't a great practice for us because we really didn't get to run a lot because of the issues. We'll get to work on it and see what we can do. Fortunately, it is one of those weekends where it is an hour-long practice, and you can go change things. If this was one of the normal weekends we have, we'd be in a really tight box. I'm confident we'll be just fine, just have to figure out what's going on."

Fastest drivers on track

When the practice finally reached its conclusion, it was Ty Gibbs topping the speed charts over the Team Penske duo of Ryan Blaney and Austin Cindric.

Hamlin was the fastest title contender in fifth overall, followed by William Byron in ninth, Larson in eleventh, and Briscoe in 16th.

Blaney led the way in best ten-lap and 20-lap averages, while Larson was the fastest of all drivers in 15-lap and 25-lap averages. Over the course of 30 laps, it was advantage Byron , before going back to Larson in 35-lap averages.

Larson also ran more laps than any other driver at 69 total laps.

NASCAR Cup full practice results

Cla Driver # Manufacturer Laps Time Interval Mph
1 T. GibbsJoe Gibbs Racing 54 Toyota 60

27.300

  131.868
2 R. BlaneyTeam Penske 12 Ford 60

+0.096

27.396

0.096 131.406
3 A. CindricTeam Penske 2 Ford 64

+0.102

27.402

0.006 131.377
4 R. PreeceRFK Racing 60 Ford 45

+0.107

27.407

0.005 131.353
5 D. HamlinJoe Gibbs Racing 11 Toyota 65

+0.126

27.426

0.019 131.262
6 C. ElliottHendrick Motorsports 9 Chevrolet 55

+0.150

27.450

0.024 131.148
7 R. ChastainTrackHouse Racing 1 Chevrolet 60

+0.152

27.452

0.002 131.138
8
J. BerryWood Brothers Racing
21 Ford 55

+0.159

27.459

0.007 131.105
9 W. ByronHendrick Motorsports 24 Chevrolet 64

+0.160

27.460

0.001 131.100
10 C. BellJoe Gibbs Racing 20 Toyota 47

+0.187

27.487

0.027 130.971
11 K. LarsonHendrick Motorsports 5 Chevrolet 69

+0.189

27.489

0.002 130.961
12 E. JonesLegacy Motor Club 43 Toyota 57

+0.191

27.491

0.002 130.952
13 T. GillilandFront Row Motorsports 34 Ford 38

+0.201

27.501

0.010 130.904
14 J. LoganoTeam Penske 22 Ford 57

+0.215

27.515

0.014 130.838
15 C. HocevarSpire Motorsports 77 Chevrolet 43

+0.239

27.539

0.024 130.724
16 C. BriscoeJoe Gibbs Racing 19 Toyota 24

+0.241

27.541

0.002 130.714
17 Z. SmithFront Row Motorsports 38 Ford 22

+0.261

27.561

0.020 130.619
18 B. Wallace23XI Racing 23 Toyota 64

+0.264

27.564

0.003 130.605
19 J. NemechekLegacy Motor Club 42 Toyota 56

+0.271

27.571

0.007 130.572
20 M. McDowellSpire Motorsports 71 Chevrolet 39

+0.277

27.577

0.006 130.544
21 A. DillonRichard Childress Racing 3 Chevrolet 44

+0.292

27.592

0.015 130.473
22 T. Reddick23XI Racing 45 Toyota 59

+0.308

27.608

0.016 130.397
23 K. BuschRichard Childress Racing 8 Chevrolet 43

+0.334

27.634

0.026 130.274
24 A. BowmanHendrick Motorsports 48 Chevrolet 59

+0.349

27.649

0.015 130.204
25 R. Stenhouse JrHyak Motorsports 47 Chevrolet 60

+0.359

27.659

0.010 130.157
26 D. SuarezTrackHouse Racing 99 Chevrolet 50

+0.389

27.689

0.030 130.016
27 C. BuescherRFK Racing 17 Ford 60

+0.399

27.699

0.010 129.969
28 C. CusterHaas Factory Team 41 Ford 54

+0.407

27.707

0.008 129.931
29 R. Herbst23XI Racing 35 Toyota 17

+0.429

27.729

0.022 129.828
30 C. WareRick Ware Racing 51 Ford 33

+0.445

27.745

0.016 129.753
31 A. AllmendingerKaulig Racing 16 Chevrolet 16

+0.449

27.749

0.004 129.734
32 J. HaleySpire Motorsports 7 Chevrolet 43

+0.461

27.761

0.012 129.678
33 N. GragsonFront Row Motorsports 4 Ford 62

+0.475

27.775

0.014 129.613
34 T. DillonKaulig Racing 10 Chevrolet 30

+0.480

27.780

0.005 129.590
35 B. KeselowskiRFK Racing 6 Ford 44

+0.492

27.792

0.012 129.534
36 S. van GisbergenTrackHouse Racing 88 Chevrolet 57

+0.524

27.824

0.032 129.385
37 C. MearsGarage 66 66 Ford 28

+0.895

28.195

0.371 127.682
38 J. YeleyNY Racing Team 44 Chevrolet 40

+0.909

28.209

0.014 127.619
 
 
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